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Re: Lidl LED floodlight
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newshound
Jan 27, 2016, 6:43:25 PM1/27/16
to
On 27/01/2016 23:26, pamela wrote:
> I see Lidl are doing this LED floodlight for £11.99 but they don't
> specify its output in lumens. Can anyone who has one say what it's
> brightness is (perhaps in terms of some other bulb).
>
> http://www.lidl.co.uk/en/our-offers-2491.htm?action=showDetail&id=30398
>
> I notice in the advert Lidl says it's 8.5W. However on the box and in
> the leaflet it says there are 12 LEDs each with 0.5W output and that
> comes to only 6W.
>
> http://www.lidl-service.com/static/69021150/93258_EN_FI_SV_DA.pdf
>
I'd expect it to be quite effective. I have a couple of five watt ones,
one lighting a gateway and car parking area about 30 feet square, the
other the doorway and approach to a shed. The latter is more than bright
enough to sit under, reading a book. These are probably comparable to 8W
CFLs.
> I see Lidl are doing this LED floodlight for £11.99 but they don't
> specify its output in lumens. Can anyone who has one say what it's
> brightness is (perhaps in terms of some other bulb).
>
> http://www.lidl.co.uk/en/our-offers-2491.htm?action=showDetail&id=30398
>
> I notice in the advert Lidl says it's 8.5W. However on the box and in
> the leaflet it says there are 12 LEDs each with 0.5W output and that
> comes to only 6W.
>
> http://www.lidl-service.com/static/69021150/93258_EN_FI_SV_DA.pdf
>
I'd expect it to be quite effective. I have a couple of five watt ones,
one lighting a gateway and car parking area about 30 feet square, the
other the doorway and approach to a shed. The latter is more than bright
enough to sit under, reading a book. These are probably comparable to 8W
CFLs.
Chris French
Jan 27, 2016, 7:31:19 PM1/27/16
to
pamela <inv...@nospam.com> Wrote in message:
> pamela
>
I suspect the discrepancy is down to a bit of rounding in the LED
power.
Based on 8.5 w, then depending on the efficiency of the LEDs
(probably between 80 -100 lumens/watt) it would be about 650 -
850 lumens. Which would be equivalent to say about a 40-50 watt
halogen
--
--
Chris French
----Android NewsGroup Reader----
http://usenet.sinaapp.com/
> I see Lidl are doing this LED floodlight for £11.99 but they don't
> specify its output in lumens. Can anyone who has one say what it's
> brightness is (perhaps in terms of some other bulb).
>
> http://www.lidl.co.uk/en/our-offers-2491.htm?action=showDetail&id=30398
>
> I notice in the advert Lidl says it's 8.5W. However on the box and in
> the leaflet it says there are 12 LEDs each with 0.5W output and that
> comes to only 6W.
>
> http://www.lidl-service.com/static/69021150/93258_EN_FI_SV_DA.pdf
>
> --
> specify its output in lumens. Can anyone who has one say what it's
> brightness is (perhaps in terms of some other bulb).
>
> http://www.lidl.co.uk/en/our-offers-2491.htm?action=showDetail&id=30398
>
> I notice in the advert Lidl says it's 8.5W. However on the box and in
> the leaflet it says there are 12 LEDs each with 0.5W output and that
> comes to only 6W.
>
> http://www.lidl-service.com/static/69021150/93258_EN_FI_SV_DA.pdf
>
> pamela
>
I suspect the discrepancy is down to a bit of rounding in the LED
power.
Based on 8.5 w, then depending on the efficiency of the LEDs
(probably between 80 -100 lumens/watt) it would be about 650 -
850 lumens. Which would be equivalent to say about a 40-50 watt
halogen
--
--
Chris French
----Android NewsGroup Reader----
http://usenet.sinaapp.com/
Dave Liquorice
Jan 28, 2016, 4:58:07 AM1/28/16
to
On Thu, 28 Jan 2016 00:29:34 +0000 (GMT+00:00), Chris French wrote:
>> I notice in the advert Lidl says it's 8.5W. However on the box and
in
>> the leaflet it says there are 12 LEDs each with 0.5W output and
that
>> comes to only 6W.
>
>> I notice in the advert Lidl says it's 8.5W. However on the box and
in
>> the leaflet it says there are 12 LEDs each with 0.5W output and
that
>> comes to only 6W.
>
> I suspect the discrepancy is down to a bit of rounding in the LED
> power.
Or 2.5 W lost in the conversion of mains to what ever the the LEDS
> power.
live off?
> Based on 8.5 w, then depending on the efficiency of the LEDs (probably
> between 80 -100 lumens/watt) it would be about 650 - 850 lumens. Which
> would be equivalent to say about a 40-50 watt halogen
we have found out why the lumens aren't quoted isn't there (I thought
it had to be these days...). It's also only IP44 so would really need
a sheltered spot. For £12.00 one ought to be able to find something
better both in terms of light output and IP rating.
We've got a 10 W COB LED, 900 l, IP65 jobbie, cost less than a tenner
but it doesn't have the PIR(*). You don't need huge amounts of light
at night, indeed too much and you can't see anything or anybody
lurking outside the pool of illumination. This works well for the
area where we park the cars and can still see outside the illuminated
area.
(*) The PIR might what is bringing the IP rating dwon, holes to
access the adjustments. There are a great many of these type out
there, with a wide range of prices for essentially the same product.
Read the descriptions carefully. Most if not all have stainless
screws holding the fitting together but not all have stainless bolts
for attaching the bracket to the fitting...
--
Cheers
Dave.
Brian Howie
Jan 28, 2016, 7:56:45 AM1/28/16
to
In message <XnsA59CEE8...@207.246.207.124>, pamela
<inv...@nospam.com> writes
>
I bought a 30W version from Lidl it's rated at 32.5W , Yours is maybe
less efficient.
It's specified at 2000 lumens, so assuming the same colour temperature
you'll get 400 lumens. The conversion from watts to lumens is quite
complicated. However someone's done an online calculator.
http://www.rapidtables.com/calc/light/watt-to-lumen-calculator.htm
Brian
--
Brian Howie
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
<inv...@nospam.com> writes
>I see Lidl are doing this LED floodlight for £11.99 but they don't
>specify its output in lumens. Can anyone who has one say what it's
>brightness is (perhaps in terms of some other bulb).
>
>http://www.lidl.co.uk/en/our-offers-2491.htm?action=showDetail&id=30398
>
>specify its output in lumens. Can anyone who has one say what it's
>brightness is (perhaps in terms of some other bulb).
>
>http://www.lidl.co.uk/en/our-offers-2491.htm?action=showDetail&id=30398
>
>I notice in the advert Lidl says it's 8.5W. However on the box and in
>the leaflet it says there are 12 LEDs each with 0.5W output and that
>comes to only 6W.
>
>http://www.lidl-service.com/static/69021150/93258_EN_FI_SV_DA.pdf
>the leaflet it says there are 12 LEDs each with 0.5W output and that
>comes to only 6W.
>
>
I bought a 30W version from Lidl it's rated at 32.5W , Yours is maybe
less efficient.
It's specified at 2000 lumens, so assuming the same colour temperature
you'll get 400 lumens. The conversion from watts to lumens is quite
complicated. However someone's done an online calculator.
http://www.rapidtables.com/calc/light/watt-to-lumen-calculator.htm
Brian
--
Brian Howie
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
Dave Plowman (News)
Jan 28, 2016, 9:19:56 AM1/28/16
to
In article <XnsA59CEE8...@207.246.207.124>,
ago come back.
I replaced 300w halogens with them, and although not as bright, do the job
reasonably. Not sure I'd be happy with much smaller ones.
--
*My luck is so bad that if I bought a cemetery, people would stop dying.
Dave Plowman da...@davenoise.co.uk London SW
To e-mail, change noise into sound.
pamela <inv...@nospam.com> wrote:
> I see Lidl are doing this LED floodlight for £11.99 but they don't
> specify its output in lumens. Can anyone who has one say what it's
> brightness is (perhaps in terms of some other bulb).
If you're not in a rush, wait to see if the 30w ones they had a few months
> I see Lidl are doing this LED floodlight for £11.99 but they don't
> specify its output in lumens. Can anyone who has one say what it's
> brightness is (perhaps in terms of some other bulb).
ago come back.
I replaced 300w halogens with them, and although not as bright, do the job
reasonably. Not sure I'd be happy with much smaller ones.
--
*My luck is so bad that if I bought a cemetery, people would stop dying.
Dave Plowman da...@davenoise.co.uk London SW
To e-mail, change noise into sound.
Adrian Caspersz
Jan 28, 2016, 11:39:16 AM1/28/16
to
On 28/01/16 14:15, Dave Plowman (News) wrote:
> In article <XnsA59CEE8...@207.246.207.124>,
> pamela <inv...@nospam.com> wrote:
>> I see Lidl are doing this LED floodlight for £11.99 but they don't
>> specify its output in lumens. Can anyone who has one say what it's
>> brightness is (perhaps in terms of some other bulb).
>
> If you're not in a rush, wait to see if the 30w ones they had a few months
> ago come back.
>
> I replaced 300w halogens with them, and although not as bright, do the job
> reasonably. Not sure I'd be happy with much smaller ones.
>
Monster "60 watt" LED bulb
> In article <XnsA59CEE8...@207.246.207.124>,
> pamela <inv...@nospam.com> wrote:
>> I see Lidl are doing this LED floodlight for £11.99 but they don't
>> specify its output in lumens. Can anyone who has one say what it's
>> brightness is (perhaps in terms of some other bulb).
>
> If you're not in a rush, wait to see if the 30w ones they had a few months
> ago come back.
>
> I replaced 300w halogens with them, and although not as bright, do the job
> reasonably. Not sure I'd be happy with much smaller ones.
>
https://www.youtube.com/watch?v=ZbBMSSr6Bgk
--
Adrian C
ARW
Jan 28, 2016, 4:03:25 PM1/28/16
to
"pamela" <inv...@nospam.com> wrote in message
news:XnsA59CEE8...@207.246.207.124...
--
Adam
news:XnsA59CEE8...@207.246.207.124...
>I see Lidl are doing this LED floodlight for £11.99 but they don't
> specify its output in lumens. Can anyone who has one say what it's
> brightness is (perhaps in terms of some other bulb).
>
> specify its output in lumens. Can anyone who has one say what it's
> brightness is (perhaps in terms of some other bulb).
>
> http://www.lidl.co.uk/en/our-offers-2491.htm?action=showDetail&id=30398
>
> I notice in the advert Lidl says it's 8.5W. However on the box and in
> the leaflet it says there are 12 LEDs each with 0.5W output and that
> comes to only 6W.
>
> http://www.lidl-service.com/static/69021150/93258_EN_FI_SV_DA.pdf
>
1.5W to control the PIR?
>
> I notice in the advert Lidl says it's 8.5W. However on the box and in
> the leaflet it says there are 12 LEDs each with 0.5W output and that
> comes to only 6W.
>
> http://www.lidl-service.com/static/69021150/93258_EN_FI_SV_DA.pdf
>
--
Adam
ARW
Jan 28, 2016, 4:06:25 PM1/28/16
to
"ARW" <adamwa...@blueyonder.co.uk> wrote in message
news:n8dvhh$bb7$1...@dont-email.me...
2.5W due to fat fingers.
--
Adam
news:n8dvhh$bb7$1...@dont-email.me...
--
Adam
ARW
Jan 29, 2016, 2:21:57 PM1/29/16
to
"pamela" <inv...@nospam.com> wrote in message
news:XnsA59EBB2...@8.17.249.104...
>
> So the loss you mention for the PIR shouldn't make any difference.
My guess is that the lights have a load of 6W (ie the 12 x 0.5W you
mentioned) and that the PIR draws an additional 2.5W load to control the
lights.
So the total load when the light is on is 8.5W. This is made up of the 6W
for the LEDs and 2.5W for the PIR.
There will be a background running load of 2.5W to control the PIR when the
lights are not on.
--
Adam
The Natural Philosopher
Jan 29, 2016, 7:40:31 PM1/29/16
to
On 29/01/16 21:07, pamela wrote:
> That doesn't seem a fair description.
Well that is a fair description of all marketing collateral...
--
Outside of a dog, a book is a man's best friend. Inside of a dog it's
too dark to read.
Groucho Marx
> That doesn't seem a fair description.
Well that is a fair description of all marketing collateral...
--
Outside of a dog, a book is a man's best friend. Inside of a dog it's
too dark to read.
Groucho Marx
Dave Plowman (News)
Jan 30, 2016, 6:05:24 AM1/30/16
to
> I see Lidl are doing this LED floodlight for £11.99 but they don't
> specify its output in lumens. Can anyone who has one say what it's
> brightness is (perhaps in terms of some other bulb).
> http://www.lidl.co.uk/en/our-offers-2491.htm?action=showDetail&id=30398
> I notice in the advert Lidl says it's 8.5W. However on the box and in
> the leaflet it says there are 12 LEDs each with 0.5W output and that
> comes to only 6W.
> http://www.lidl-service.com/static/69021150/93258_EN_FI_SV_DA.pdf
Buy one and carefully try it out. If not bright enough, take it back.
> specify its output in lumens. Can anyone who has one say what it's
> brightness is (perhaps in terms of some other bulb).
> http://www.lidl.co.uk/en/our-offers-2491.htm?action=showDetail&id=30398
> I notice in the advert Lidl says it's 8.5W. However on the box and in
> the leaflet it says there are 12 LEDs each with 0.5W output and that
> comes to only 6W.
> http://www.lidl-service.com/static/69021150/93258_EN_FI_SV_DA.pdf
--
*Prepositions are not words to end sentences with *
DerbyBorn
Jan 30, 2016, 8:07:09 AM1/30/16
to
>
> Buy one and carefully try it out. If not bright enough, take it back.
>
Do you think that the design of a LED version is all wrong. Are they trying
> Buy one and carefully try it out. If not bright enough, take it back.
>
to use up the casings that were made for Halogen lights? The reflector
serves little purpose with surface mounted LEDs.
Someting properly disgned to maximise the LED source is needed.
Rod Speed
Jan 30, 2016, 2:39:29 PM1/30/16
to
news:XnsA59ED6D...@207.246.207.167...
> That would mean that, as Lidl are advertising this floodlight as 8.5 W,
> then if they used a less efficient PIR which required 10W then they
> could advertise the LED floodlight as 16 W. (10 W for the PIR and 6 W
> for the LED).
up when they called it a 8.5W flood because they
used the total power consumption and not the
actual light power, likely because they didn’t
notice the problem at the time.
> then if they used a less efficient PIR which required 10W then they
> could advertise the LED floodlight as 16 W. (10 W for the PIR and 6 W
> for the LED).
>
> That doesn't seem a fair description.
Sure, but it seems pretty clear that someone fuckup
> That doesn't seem a fair description.
up when they called it a 8.5W flood because they
used the total power consumption and not the
actual light power, likely because they didn’t
notice the problem at the time.
rngo
Jan 30, 2016, 7:19:27 PM1/30/16
to
"DerbyBorn" <Some...@Nearhome.com> wrote in message
news:XnsA59F851447000Tr...@81.171.92.222...
>>
>> Buy one and carefully try it out. If not bright enough, take it back.
>>
>
> Do you think that the design of a LED version is all wrong. Are they
> trying
> to use up the casings that were made for Halogen lights?
Unlikely they have a big pile of casings to use up.
>> Buy one and carefully try it out. If not bright enough, take it back.
>>
>
> Do you think that the design of a LED version is all wrong. Are they
> trying
> to use up the casings that were made for Halogen lights?
Dave Plowman (News)
Jan 30, 2016, 7:59:01 PM1/30/16
to
In article <XnsA59F851447000Tr...@81.171.92.222>,
I've got the 30w ones they had on offer last year. The reflector on those
certainly isn't just for show.
BTW, when does a floodlight cease to be a floodlight? Can't remember ever
seeing a 60w tungsten called that.
--
*I'm planning to be spontaneous tomorrow *
certainly isn't just for show.
BTW, when does a floodlight cease to be a floodlight? Can't remember ever
seeing a 60w tungsten called that.
--
*I'm planning to be spontaneous tomorrow *
ARW
Jan 31, 2016, 4:19:57 AM1/31/16
to
"Rod Speed" <rod.sp...@gmail.com> wrote in message
news:dh4hra...@mid.individual.net...
--
Adam
news:dh4hra...@mid.individual.net...
>> That doesn't seem a fair description.
>
> Sure, but it seems pretty clear that someone fuckup
> up when they called it a 8.5W flood because they
> used the total power consumption and not the
> actual light power, likely because they didn’t
> notice the problem at the time.
Indeed. It is far more likely to be a fuck up than an intention to mislead.
>
> Sure, but it seems pretty clear that someone fuckup
> up when they called it a 8.5W flood because they
> used the total power consumption and not the
> actual light power, likely because they didn’t
> notice the problem at the time.
--
Adam
ARW
Jan 31, 2016, 4:37:07 AM1/31/16
to
"Dave Plowman (News)" <da...@davenoise.co.uk> wrote in message
news:554a516...@davenoise.co.uk...
of reflector.
Other LED floods have multiple LEDs spread around the surface of the fitting
and have no reflector
eg
http://3.imimg.com/data3/TU/JS/MY-4967819/led-flood-light-20w-500x500.png
> BTW, when does a floodlight cease to be a floodlight? Can't remember ever
> seeing a 60w tungsten called that.
And why not? If the fitting is similar to to the SON floodlights we are
familiar with I would still call it a floodlight even if it had a 60
tungsten in it!
--
Adam
news:554a516...@davenoise.co.uk...
> In article <XnsA59F851447000Tr...@81.171.92.222>,
> DerbyBorn <Some...@Nearhome.com> wrote:
>> Do you think that the design of a LED version is all wrong. Are they
>> trying
>> to use up the casings that were made for Halogen lights? The reflector
>> serves little purpose with surface mounted LEDs.
>> Someting properly disgned to maximise the LED source is needed.
>
> I've got the 30w ones they had on offer last year. The reflector on those
> certainly isn't just for show.
Indeed, you have a 30W LED as a point source. Therefore you need some sort
> DerbyBorn <Some...@Nearhome.com> wrote:
>> Do you think that the design of a LED version is all wrong. Are they
>> trying
>> to use up the casings that were made for Halogen lights? The reflector
>> serves little purpose with surface mounted LEDs.
>> Someting properly disgned to maximise the LED source is needed.
>
> I've got the 30w ones they had on offer last year. The reflector on those
> certainly isn't just for show.
of reflector.
Other LED floods have multiple LEDs spread around the surface of the fitting
and have no reflector
eg
http://3.imimg.com/data3/TU/JS/MY-4967819/led-flood-light-20w-500x500.png
> BTW, when does a floodlight cease to be a floodlight? Can't remember ever
> seeing a 60w tungsten called that.
familiar with I would still call it a floodlight even if it had a 60
tungsten in it!
--
Adam
Dave Plowman (News)
Jan 31, 2016, 6:04:48 AM1/31/16
to
In article <n8kken$f4t$1...@dont-email.me>,
light. And a 10w LED ain't going to do that. The 30w ones don't really
either, but are just about adequate. The old 300w halogen did.
--
*If you can read this, thank a teecher
ARW <adamwa...@blueyonder.co.uk> wrote:
> > BTW, when does a floodlight cease to be a floodlight? Can't remember ever
> > seeing a 60w tungsten called that.
> And why not? If the fitting is similar to to the SON floodlights we are
> familiar with I would still call it a floodlight even if it had a 60
> tungsten in it!
Perhaps it's just me but I expect a floodlight to flood the area with
> > BTW, when does a floodlight cease to be a floodlight? Can't remember ever
> > seeing a 60w tungsten called that.
> And why not? If the fitting is similar to to the SON floodlights we are
> familiar with I would still call it a floodlight even if it had a 60
> tungsten in it!
light. And a 10w LED ain't going to do that. The 30w ones don't really
either, but are just about adequate. The old 300w halogen did.
--
*If you can read this, thank a teecher
charles
Jan 31, 2016, 7:00:43 AM1/31/16
to
In article <554a88b...@davenoise.co.uk>, Dave Plowman (News)
--
from KT24 in Surrey, England
<da...@davenoise.co.uk> wrote:
> In article <n8kken$f4t$1...@dont-email.me>, ARW
> <adamwa...@blueyonder.co.uk> wrote:
> > > BTW, when does a floodlight cease to be a floodlight? Can't remember
> > > ever seeing a 60w tungsten called that.
> > And why not? If the fitting is similar to to the SON floodlights we are
> > familiar with I would still call it a floodlight even if it had a 60
> > tungsten in it!
> Perhaps it's just me but I expect a floodlight to flood the area with
> light. And a 10w LED ain't going to do that. The 30w ones don't really
> either, but are just about adequate. The old 300w halogen did.
a 10watt halogen light the area round my wheeliebins quite adequately.
> In article <n8kken$f4t$1...@dont-email.me>, ARW
> <adamwa...@blueyonder.co.uk> wrote:
> > > BTW, when does a floodlight cease to be a floodlight? Can't remember
> > > ever seeing a 60w tungsten called that.
> > And why not? If the fitting is similar to to the SON floodlights we are
> > familiar with I would still call it a floodlight even if it had a 60
> > tungsten in it!
> Perhaps it's just me but I expect a floodlight to flood the area with
> light. And a 10w LED ain't going to do that. The 30w ones don't really
> either, but are just about adequate. The old 300w halogen did.
--
from KT24 in Surrey, England
ARW
Jan 31, 2016, 12:23:48 PM1/31/16
to
"Dave Plowman (News)" <da...@davenoise.co.uk> wrote in message
news:554a88b...@davenoise.co.uk...
> In article <n8kken$f4t$1...@dont-email.me>,
> ARW <adamwa...@blueyonder.co.uk> wrote:
>> > BTW, when does a floodlight cease to be a floodlight? Can't remember
>> > ever
>> > seeing a 60w tungsten called that.
>
>> And why not? If the fitting is similar to to the SON floodlights we are
>> familiar with I would still call it a floodlight even if it had a 60
>> tungsten in it!
>
> Perhaps it's just me but I expect a floodlight to flood the area with
> light. And a 10w LED ain't going to do that. The 30w ones don't really
> either, but are just about adequate. The old 300w halogen did.
That depends on the size of the area you want to flood with light.
> ARW <adamwa...@blueyonder.co.uk> wrote:
>> > BTW, when does a floodlight cease to be a floodlight? Can't remember
>> > ever
>> > seeing a 60w tungsten called that.
>
>> And why not? If the fitting is similar to to the SON floodlights we are
>> familiar with I would still call it a floodlight even if it had a 60
>> tungsten in it!
>
> Perhaps it's just me but I expect a floodlight to flood the area with
> light. And a 10w LED ain't going to do that. The 30w ones don't really
> either, but are just about adequate. The old 300w halogen did.
--
Adam
alan_m
Jan 31, 2016, 12:23:49 PM1/31/16
to
On 28/01/2016 21:03, ARW wrote:
>> I notice in the advert Lidl says it's 8.5W. However on the box and in
>> the leaflet it says there are 12 LEDs each with 0.5W output and that
>> comes to only 6W.
>> I notice in the advert Lidl says it's 8.5W. However on the box and in
>> the leaflet it says there are 12 LEDs each with 0.5W output and that
>> comes to only 6W.
> 1.5W to control the PIR?
>
If you look at many of Big Clive's LED light pull-apart Youtube videos
>
he starts with checking the power taken from the mains and often
comments that a 30% shortfall is common with Chinese sourced products.
Example
https://www.youtube.com/watch?v=Ag5XknXGkZ8
Measuring a 20W LED
--
mailto: news {at} admac {dot] myzen {dot} co {dot} uk
alan_m
Jan 31, 2016, 2:59:34 PM1/31/16
to
design is suited for the large LED arrays used in these devices.
alan_m
Jan 31, 2016, 3:03:22 PM1/31/16
to
On 31/01/2016 09:36, ARW wrote:
> Indeed, you have a 30W LED as a point source. Therefore you need some
> sort of reflector.
The LED itself will have a 120 degree illumination angle. What would a
> Indeed, you have a 30W LED as a point source. Therefore you need some
> sort of reflector.
reflector of a LED be reflecting?
With a halogen light emerges at 360 degrees and the reflector is just
reflecting what comes out the back forwards.
Rod Speed
Jan 31, 2016, 5:34:40 PM1/31/16
to
news:554a516...@davenoise.co.uk...
> Can't remember ever seeing a 60w tungsten called that.
Because that's not much of a floodlight, stupid.
> In article <XnsA59F851447000Tr...@81.171.92.222>,
> DerbyBorn <Some...@Nearhome.com> wrote:
>> >
>> > Buy one and carefully try it out. If not bright enough, take it back.
>> >
>
>> Do you think that the design of a LED version is all wrong. Are they
>> trying
>> to use up the casings that were made for Halogen lights? The reflector
>> serves little purpose with surface mounted LEDs.
>> Someting properly disgned to maximise the LED source is needed.
>
> I've got the 30w ones they had on offer last year. The reflector on those
> certainly isn't just for show.
>
> BTW, when does a floodlight cease to be a floodlight?
When it doesn’t direct the light anymore.
> DerbyBorn <Some...@Nearhome.com> wrote:
>> >
>> > Buy one and carefully try it out. If not bright enough, take it back.
>> >
>
>> Do you think that the design of a LED version is all wrong. Are they
>> trying
>> to use up the casings that were made for Halogen lights? The reflector
>> serves little purpose with surface mounted LEDs.
>> Someting properly disgned to maximise the LED source is needed.
>
> I've got the 30w ones they had on offer last year. The reflector on those
> certainly isn't just for show.
>
> BTW, when does a floodlight cease to be a floodlight?
> Can't remember ever seeing a 60w tungsten called that.
ARW
Jan 31, 2016, 5:53:19 PM1/31/16
to
"alan_m" <ju...@admac.myzen.co.uk> wrote in message
news:dh77k6...@mid.individual.net...
--
Adam
news:dh77k6...@mid.individual.net...
> On 31/01/2016 09:36, ARW wrote:
>
>> Indeed, you have a 30W LED as a point source. Therefore you need some
>> sort of reflector.
>
> The LED itself will have a 120 degree illumination angle.
Is that a fact?
>
>> Indeed, you have a 30W LED as a point source. Therefore you need some
>> sort of reflector.
>
> The LED itself will have a 120 degree illumination angle.
--
Adam
alan_m
Jan 31, 2016, 6:13:39 PM1/31/16
to
that for a typical LED array as used in these fittings which suggests
that the reflector has close to zero effect. There is light output from
the LED at +/- 60 degrees with practically zero beyond these limits.
Dave Plowman (News)
Jan 31, 2016, 6:53:54 PM1/31/16
to
In article <dh7iov...@mid.individual.net>,
ones here have a the central LED array only slightly brighter than the
reflector. Not so very different from a halogen.
--
*Age is a very high price to pay for maturity.
alan_m <ju...@admac.myzen.co.uk> wrote:
> The photometric data for a typical LED floodlight is almost identical to
> that for a typical LED array as used in these fittings which suggests
> that the reflector has close to zero effect. There is light output from
> the LED at +/- 60 degrees with practically zero beyond these limits.
If that were the case viewing the luminair would show it to be so. The
> The photometric data for a typical LED floodlight is almost identical to
> that for a typical LED array as used in these fittings which suggests
> that the reflector has close to zero effect. There is light output from
> the LED at +/- 60 degrees with practically zero beyond these limits.
ones here have a the central LED array only slightly brighter than the
reflector. Not so very different from a halogen.
--
*Age is a very high price to pay for maturity.
Chris French
Feb 1, 2016, 8:42:53 AM2/1/16
to
In message <XnsA59D775...@207.246.207.121>, pamela
<inv...@nospam.com> writes
>On 00:29 28 Jan 2016, Chris French wrote:
>
>> pamela <inv...@nospam.com> Wrote in message:
>calculation and the LED lamp might actually be only 6 W.
>
>A brightness equivalent to 40 W halogen isn't going to be enormous.
>
>Those old PIR floodlights are too bright with their 300 or 500 W bulbs but
>this is right at the other end of the scale. 40 watt halogen is not much
>more than a courtesy light as opposed to a security light.
>
>Maybe I'll look at some other unit.
>
I was in Lidl yesterday, the had a pile of these still.
I had a look at them, on the box it says they have an output of 760
lumens. Construction seems fine. The PIR looked like a pretty much
standard PIR for this sort of lamp.
In reality IP44 is fine for this sort of thing I think (I would guess
the lamp unit it self is higher, it will either be the PIR or the little
box where the cable connects in) IP44 means resists to splashing water
and spray, but not to water jets directed at it.
In fact I bought one. I've got a spot that could do with a lamp that
doesn't need to be that bright so this should be ok. I've been meaning
to get one for ages, so striking while the irons hot and all that :-)
--
Chris French
<inv...@nospam.com> writes
>On 00:29 28 Jan 2016, Chris French wrote:
>
>> pamela <inv...@nospam.com> Wrote in message:
>>
>>> I see Lidl are doing this LED floodlight for £11.99 but they don't
>>> specify its output in lumens. Can anyone who has one say what it's
>>> brightness is (perhaps in terms of some other bulb).
>>>
>>> http://www.lidl.co.uk/en/our-offers-2491.htm?action=showDetail&id=30398
>>>
>>> I see Lidl are doing this LED floodlight for £11.99 but they don't
>>> specify its output in lumens. Can anyone who has one say what it's
>>> brightness is (perhaps in terms of some other bulb).
>>>
>>> http://www.lidl.co.uk/en/our-offers-2491.htm?action=showDetail&id=30398
>>>
>>> I notice in the advert Lidl says it's 8.5W. However on the box and in
>>> the leaflet it says there are 12 LEDs each with 0.5W output and that
>>> comes to only 6W.
>>>
>>> http://www.lidl-service.com/static/69021150/93258_EN_FI_SV_DA.pdf
>>> the leaflet it says there are 12 LEDs each with 0.5W output and that
>>> comes to only 6W.
>>>
>>>
>>
>> I suspect the discrepancy is down to a bit of rounding in the LED
>> power.
>>
>>
>> I suspect the discrepancy is down to a bit of rounding in the LED
>> power.
>>
>> Based on 8.5 w, then depending on the efficiency of the LEDs (probably
>> between 80 -100 lumens/watt) it would be about 650 - 850 lumens. Which
>> would be equivalent to say about a 40-50 watt halogen
>
>It might be closer to your lower value because you're using 8.5 W in your
>> between 80 -100 lumens/watt) it would be about 650 - 850 lumens. Which
>> would be equivalent to say about a 40-50 watt halogen
>
>calculation and the LED lamp might actually be only 6 W.
>
>A brightness equivalent to 40 W halogen isn't going to be enormous.
>
>Those old PIR floodlights are too bright with their 300 or 500 W bulbs but
>this is right at the other end of the scale. 40 watt halogen is not much
>more than a courtesy light as opposed to a security light.
>
>Maybe I'll look at some other unit.
>
I was in Lidl yesterday, the had a pile of these still.
I had a look at them, on the box it says they have an output of 760
lumens. Construction seems fine. The PIR looked like a pretty much
standard PIR for this sort of lamp.
In reality IP44 is fine for this sort of thing I think (I would guess
the lamp unit it self is higher, it will either be the PIR or the little
box where the cable connects in) IP44 means resists to splashing water
and spray, but not to water jets directed at it.
In fact I bought one. I've got a spot that could do with a lamp that
doesn't need to be that bright so this should be ok. I've been meaning
to get one for ages, so striking while the irons hot and all that :-)
--
Chris French
Bill Wright
Feb 1, 2016, 3:59:04 PM2/1/16
to
On 31/01/2016 23:50, Dave Plowman (News) wrote:
> In article <dh7iov...@mid.individual.net>,
> alan_m <ju...@admac.myzen.co.uk> wrote:
>> The photometric data for a typical LED floodlight is almost identical to
>> that for a typical LED array as used in these fittings which suggests
>> that the reflector has close to zero effect. There is light output from
>> the LED at +/- 60 degrees with practically zero beyond these limits.
>
> If that were the case viewing the luminair would show it to be so. The
> ones here have a the central LED array only slightly brighter than the
> reflector. Not so very different from a halogen.
>
In the ones I've used the light from the LED doesn't reach the reflector
> In article <dh7iov...@mid.individual.net>,
> alan_m <ju...@admac.myzen.co.uk> wrote:
>> The photometric data for a typical LED floodlight is almost identical to
>> that for a typical LED array as used in these fittings which suggests
>> that the reflector has close to zero effect. There is light output from
>> the LED at +/- 60 degrees with practically zero beyond these limits.
>
> If that were the case viewing the luminair would show it to be so. The
> ones here have a the central LED array only slightly brighter than the
> reflector. Not so very different from a halogen.
>
at all. The cut off is from the frame. I think this is why LED floods
sometimes disappoint when compared with halogens, because they cast such
a wide, even, beam.
Bill
Chris French
Feb 5, 2016, 5:10:32 AM2/5/16
to
pamela <inv...@nospam.com> Wrote in message:
> expected but the light is probably too weak for what I need.
>
> I need lights for outdoors "scare-away" security but not so bright that
> the neighbours object.
>
> I suppose I could compromise a bit on brightness in order to have to
> have the low maintenence of LEDs because the units will be mounted in
> awkward places.
>
If it won't be bright enough, don't buy it, there are plenty of
higher output ones around. Try CPC or Ledhut, or eBay for cheaper
ones
--
--
Chris French
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