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gregcampbellusa(at)gmail.
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 Posted: Sun Feb 25, 2007 8:33 pm Post subject: LED Landing Lights again... |
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I recall seeing a teardrop shaped LED taxi light combined with a strobe head.
Has anybody seen any progress on LED headlights that would be suitable
for use as landing lights? I'm getting ready to work on my cowl and was
hoping there might be something out there by now.
Eric - you always seem to know what's coming coming up in the LED market.
Any ideas?
Thanks!
Greg
[quote][b]
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Eric M. Jones
Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts
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| Posted: Tue Feb 27, 2007 9:58 am Post subject: Re: LED Landing Lights again... |
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Lexus has backed off on their introduction of high beam AND low beam in their Spring cars in the US (probably due to the DOT tests). Now only their low beam is LED. Audi R8 has low beam LEDs only as well I hear.
Personally, I would avoid lamps made with dozens of smaller LEDs--but they would do in a pinch.
You could use four of the brightest MR16 3W Cree LED lamps such as: http://www.theledlight.com/dcbulbs.html. They would be just short of 500 lumens and 25 degrees, but being 6000k white makes up for a lot. Or at least you can build in the sockets for MR16 lamps and wait for the technology to get better (and it is getting better very FAST).
If you belong to an EAA chapter I would suggest getting together and buying samples of significant LED lamps from time to time to benchmark the technology. It would be money well spent.
Lamps of 70-90 lumens/watt are now for sale. http://techon.nikkeibp.co.jp/english/NEWS_EN/20050622/106025/
Expect the following--
Initially many will reject LED lights because they will not be as bright and they will be more expensive (you can't SEE energy savings or efficiency...). "Filament" cults will arise, clinging to the "Warmth" of filaments versus the LED's coldness. Some will claim the eye can see better or is more comfortable in "Filament-lighted" workplaces. Some rich people will have totally "Filament-Lighted" homes. Soon there will be filament light museums. Ah, yes......
"...Beans for supper tonight, six o'clock.
Navy beans cooked in Oklahoma ham...
Got to eat 'em with a spoon, raw onions
and cornbread; nothing else...."
--Will Rogers
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_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net |
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rvbuilder(at)sausen.net
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| Posted: Tue Feb 27, 2007 10:48 am Post subject: LED Landing Lights again... |
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Ah yes, the incandescent debate is always interesting. California and
Australia are both on the verge of banning all incandescents in favor of
CFL. Energy efficiency is a good thing but banning an entire technology
rather than specifying actual metrics to gauge performance is a bad
thing. As they are both ready to go forward with their respective
legislations, GE has developed a technology that allows incandescents to
be nearly as efficient as CFL. Too bad the wording of the law is
counter to the intent.
Michael Sausen
-10 #352 Limbo
Do not archive
--
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Terry Watson
Joined: 09 Jan 2006
Posts: 290
Location: Seattle, WA USA
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| Posted: Tue Feb 27, 2007 11:43 am Post subject: LED Landing Lights again... |
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Note that compact fluorescent and at least some 120 volt L.E.D. lights are
NOT dimmable, which means replacing millions of dimmer switches in houses.
The compact fluorescent are also incompatible with many remote controlled
lighting circuits, which means even more replacements. The California law
strikes me as a perfect example of unintended consequences outweighing the
benefits of the intended results. Let markets decide which technology is
best, not your elected representatives and non-elected bureaucrats.
Terry
p.s. More to the point of the AeroElectric list, I read somewhere -- most
likely here -- that the white or blue L.E.D. lights are less noticeable
during the daylight hours than the less natural yellow light of incandescent
bulbs, making L.E.D. landing lights less effective as attention-getters.
-------------------------------------------------------------------------
Ah yes, the incandescent debate is always interesting. California and
Australia are both on the verge of banning all incandescents in favor of
CFL. Energy efficiency is a good thing but banning an entire technology
rather than specifying actual metrics to gauge performance is a bad
thing. As they are both ready to go forward with their respective
legislations, GE has developed a technology that allows incandescents to
be nearly as efficient as CFL. Too bad the wording of the law is
counter to the intent.
Michael Sausen
-10 #352 Limbo
Do not archive
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echristley(at)nc.rr.com
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| Posted: Tue Feb 27, 2007 12:49 pm Post subject: LED Landing Lights again... |
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Terry Watson wrote:
| Quote: | p.s. More to the point of the AeroElectric list, I read somewhere -- most
likely here -- that the white or blue L.E.D. lights are less noticeable
during the daylight hours than the less natural yellow light of incandescent
bulbs, making L.E.D. landing lights less effective as attention-getters.
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besthongkong.com has 'warm white' LEDs that are closer to what a
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filament light creates. Nearly 150lm for it's 5-watts of consumption,
and only about $12 each.
--
,|"|"|, Ernest Christley |
----===<{{(oQo)}}>===---- Dyke Delta Builder |
o| d |o http://ernest.isa-geek.org |
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