Lumotec LYT
andy
shaped dark pattern in the middle of the beam. It is best seen at
0:30-0:40 in my low-quality video: http://youtu.be/VyRnKm5neSY
My pattern is worse than the photo on the B&M website: http://goo.gl/xpYB6
Is this normal?
Thanks,
Andy
Brian Ogilvie
Is this the same Lyt that you asked about last month on Bicycle
Lifestyle (http://tinyurl.com/bv86qp5), or did you replace that one?
As I wrote on that list, my Lyt has a similar pattern; I think it's a
result of the lens design that B&M used to get both asymmetrical
distance illumination and near field illumination.
If it really bothers you, you could take the light back to the shop
where you bought it and exchange it for another one.
Brian
On Fri, Dec 16, 2011 at 6:13 AM, andy <sagit...@gmail.com> wrote:
> I bought a new LYT. It is reasonably bright, but has a funny heart-
> shaped dark pattern in the middle of the beam...
> Is this normal?
--
Brian W. Ogilvie <bwog...@gmail.com>
Paris, France
http://www.pobox.com/~ogilvie
andy
It is the same Lyt. I did not seek an exchange because I bent and
scratched up the mounting bracket pretty bad. I had hoped I would get
accustomed to the pattern in six weeks, but I have not. The dark
voids in the middle are terrible; I lose sight of potholes and trash
in the dark spots.
I am really curious why no one else is complaining about this. On one
hand, both you and Peter White said it was to be expected. On the
other hand, my pattern looks nothing like the photo posted by Peter.
And Jan Heine gave a pleasant review
http://janheine.wordpress.com/2011/12/09/new-led-taillight-solutions/
Design point or defective unit? Unknown. Right now I do not
recommend the Lyt to anyone.
Andy
Brian Ogilvie
It does sound like your light is defective, then. It's hard to judge
based on the video, since cameras often adjust their sensitivity to
match the available light, but it looks like the near field lighting
on yours is a lot brighter than it should be; on mine, most of the
light ends up getting thrown into the far field, and the dark spots
aren't that big--they're similar to the gap between the near-field and
far-field lighting on my Cyo R.
I wonder if the LED isn't positioned properly? If it's in the wrong
place, the lens might not be focusing the light properly. I once
dropped a blinky down a five-story stairwell (by accident!). It still
worked after I gathered the pieces and assembled them, but many of the
LEDs had been knocked out of place and were no longer properly aligned
with the lens. Those ones were a lot dimmer than the other ones.
Something similar might be the case with yours. If you bought it at an
LBS that values your business, you might be able to return it anyway.
(They could always swap the brackets if yours is too scratched to
return to B&M.)
I'm curious to see if anyone else on Randon-L uses the Lyt and what they think.
Brian
On Fri, Dec 16, 2011 at 4:59 PM, andy <sagit...@gmail.com> wrote:
> Hi Brian,
> It is the same Lyt. I did not seek an exchange because I bent and
> scratched up the mounting bracket pretty bad. I had hoped I would get
> accustomed to the pattern in six weeks, but I have not. The dark
> voids in the middle are terrible; I lose sight of potholes and trash
> in the dark spots.
--
Jan Heine
Looking at your beam pattern and the one on the B&M site (they have
two up, and I am talking about the one on the left side as a little
thumbnail here http://www.bumm.de/produkte/dynamo-scheinwerfer/lumotec-lyt.html),
the beam patterns are the same. So the limitation is inherent in the
light.
Everybody has different sensitivities to dark spots. Some riders are
really bothered by the dark spot immediately in front of the light
that you get with the IQ Cyo and Edelux, but most randonneurs scan the
road much further ahead anyhow.
When the Lyt was evaluated for Bicycle Quarterly, it was compared to
other similarly priced LED lights (like the Spanninga and the Planet
Bike), as well as older halogen ligths (like the E6). The Lyt was in a
different class, much better. However, if you want the ultimate in
illumination, I recommend the IQ Cyo, or even better, the Edelux.
Jan Heine
Compass Bicycles Ltd.
http://www.compasscycle.com
Follow our blog at http://janheine.wordpress.com/
On Dec 16, 7:59 am, andy <sagitta...@gmail.com> wrote:
> Hi Brian,
> It is the same Lyt. I did not seek an exchange because I bent and
> scratched up the mounting bracket pretty bad. I had hoped I would get
> accustomed to the pattern in six weeks, but I have not. The dark
> voids in the middle are terrible; I lose sight of potholes and trash
> in the dark spots.
>
> I am really curious why no one else is complaining about this. On one
> hand, both you and Peter White said it was to be expected. On the
> other hand, my pattern looks nothing like the photo posted by Peter.
> And Jan Heine gave a pleasant reviewhttp://janheine.wordpress.com/2011/12/09/new-led-taillight-solutions/
pamela blalock
a commuter bike.
I do like the CYO that is on the bike I used for brevets this year.
pamela blalock
watertown, ma
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Brian Ogilvie
only that, given the limitations of judging the light based on a
video--is that his dark spot is much larger and darker than the one on
my Lyt or on the B&M website. That's what makes me wonder whether the
LED on his Lyt is not positioned properly behind the lens.
The Cyo and Ixon IQ are much nicer lights, but at a much higher price point!
Brian
On Fri, Dec 16, 2011 at 5:31 PM, Jan Heine <hei...@earthlink.net> wrote:
> Looking at your beam pattern and the one on the B&M site (they have
> two up, and I am talking about the one on the left side as a little
> thumbnail here http://www.bumm.de/produkte/dynamo-scheinwerfer/lumotec-lyt.html),
> the beam patterns are the same. So the limitation is inherent in the
> light.
--