Re: 2D Compact Fluorescent Bulbs
Andrew Gabriel
In article <7k0brnF...@mid.individual.net>,
Steve Slatcher <steve.s...@pobox.com> writes:
> Sorry if this might not be DIY enough, but I was guessing that people
> here would have opinions on the subject.
>
> I am considering buying a number of flush light fittings, and the
> favourite so far takes a 2D compact fluorescent bulb (2 pin FWIW). I was
> wondering if there are any disadvantages I should be aware of. I am
> particularly concerned about potential lack of availability in the
> future. Anyone know if this style is currently getting more or les
> popular, or if the EU is planning to phase it out through legislation?
The current 2D lamps are below the minimum efficiency the EU plans
to allow. However, at least one manufacturer seems to think they are
sufficiently important that they have started producing more energy
efficient retrofits, so I think you're safe in choosing to use them.
Their use is very widespread in commercial fittings. 16W, 28W, and
38W are common (energy efficient retrofits will be slightly lower
ratings). 10W, 21W, and 55W are much less common and I guess might
be less likely to be replaced by energy efficient retrofits (which
is unfortunate, because I use these in some luminaires I have
designed myself).
2D lamps can be mounted in any orientation, but if mounted vertically,
the loops should be at the top. They are available in 2-pin versions
with a built-in starter for 240V series ballasts, or 4-pin versions
for electronic control gear (dimmable with suitable control gear).
--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]
Steve Slatcher
Many thanks for the helpful reply, Andrew.
--
Steve Slatcher
http://pobox.com/~steve.slatcher
Rusty
news:hbf0bb$2c8$1...@news.eternal-september.org...
Speaking of 2D lamps, a day or two ago I was searching for good 3-way CFLs
(US) and came across this model from GE:
http://www.elightbulbs.com/catalog_product.cfm?source=GoogleBaseCSE&prod=GL11526
I really liked the replaceability factor and it would work well in a lamp
with harp situation. but alas, I could not find it anywhere else on the
web. All I could find was a version that was 1-way only.
Apparently it was discontinued, and I was wondering if anyone knows anything
about this, or if there is anything similar to this that has a replaceable
tube configuration?
TKM
"Rusty" <russju...@netscape.net> wrote in message
news:hbkuec$bdg$1...@aioe.org...
The 3-way 2D self-ballasted lamp appears to have been delisted since it
doesn't show up in the 2008-09 GE lamp catalog. Putting in the FEA39/2D
designation, however, did bring up several sources of the product.
Similar products use the "Circline" lamp. One is shown at:
http://www.grainger.com/1/1/20175-energy-choice-fca21-cd-lamp-fca-21-cd-21-w.html
But the newer, more-efficient products are designed for T8 or T5 lamps.
Terry McGowan
Rusty
news:hblb0t$okp$1...@news.eternal-september.org...
I haven't seen any that are 3-way.
I settled on a couple of spiral 3-way CFLs, but they were a bit more
expensive than I liked, I even had to upgrade the harp on one of the lamps
to make the bulb fit.
I hope they last!
Rusty
"Rusty" <russju...@netscape.net> wrote in message
news:hbm4er$fb7$1...@aioe.org...
I spoke too soon, apparantly there are some 3-way circline types out there:
This one with the stacked tube seems nice, but I question how readily
avaliable the tubes are since it seems non-standard.
Victor Roberts
I've used one of these for years in a floor lamp (i.e.
portable luminaire). It's been a great lamp, and I'm
disappointed that it is no longer available.
--
Vic Roberts
http://www.RobertsResearchInc.com
http://www.cflfacts.com
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Victor Roberts
wrote:
Wow! This is just an old technology Circline lamp. Amazing
that this is still available while the 2D is not. Remember
that the 2D lamps are T6 or T5, depending upon wattage, so
they should be rather good.
TKM
"Victor Roberts" <x...@lighting-research.com> wrote in message
news:fgqud5dmmgharaee7...@4ax.com...
I hope that I didn't give the impression that 2D lamps have disappeared.
They haven't and several types are listed in the current GE Lamp Catalog.
The 3-way lamp/ballast kit using the 2D lamp seems to be gone, however.
My "Berkeley" table lamp which was originally designed with two 2D lamps on
dimmers is still going strong after some 10 years of use (and only one lamp
replacement). But the Berkeley lamp itself has been redesigned as Berkeley
Lamp II. It's now Energy Star listed and uses 70 watt T5 circular lamps.
Terry McGowan
Victor Roberts
wrote:
Thanks for making that point. I do expect that I will be
able to buy 2D replacement lamps for quite some time.
However, I expect that the ballast will eventually fail,
even though the design of this system, and others like it,
places the ballast in the coolest possible location.
The new 70-watt T5 system sounds interesting.
Regards,