Steve,

Interesting find! As a point of reference, a 4" x 4" LED light fits nicely in the wingtip of my RV-7 (new style non-swept wingtip). It looks like there could be enough room to install the DDM Tunning 3.3" x 5" LED lights. Here's a pic of my installation to give you a better idea:

DSCN2939.JPG


Since the DDM LED's are shorter, they could probably be installed closer to the tips.

Sounds like a fun project! Get 'em and lets get some real-world performance feedback!
 
Looks very impressive and very cost effective. I'd be interested to hear how they perform. Also, whether it would fit in a duckworks leading edge installation. I've cut my wings for two duckworks LE lights but I'm holding off buying the lights themselves exactly because of this- The cost of LEDs continues to fall.
 
LED Landing Lights for $40

I agree, the lights are priced right. I was recently trying to figure out how many lumens equal a 100 watt bulb candle output. I know there are many variables involved, but the average seemed to work out at approximately 1600 lumens equals 100 candles. Not scientific but it does give a reasonable plus or minus comparison. Based on this 1800 lumen number these LEDs look like a good deal. Now to determine which is better for our intended use; spot, 30 degree spread, 60 degree or 120 degree, decisions decisions. Dan
 
guccidude1 said:
I agree, the lights are priced right. I was recently trying to figure out how many lumens equal a 100 watt bulb candle output. I know there are many variables involved, but the average seemed to work out at approximately 1600 lumens equals 100 candles. Not scientific but it does give a reasonable plus or minus comparison. Based on this 1800 lumen number these LEDs look like a good deal. Now to determine which is better for our intended use; spot, 30 degree spread, 60 degree or 120 degree, decisions decisions. Dan
Click to expand...

Standard 4509 aircraft landing light bulb specs are -

110,000 candle power

12 degrees horizontal spread

6 degrees vertical spread


To get lumens to candle power needs the beam size.

From someone else's calculations - not verified...:)

For a 10 degree beam

1800 lumens is about 75,000 candle power


ADDED

This data sheet gives a 10 degree beam and 1570 lumens as 49,000 candle power

http://www.rigidindustries.com/Dually-LED-Light-Spot-p/dually-sp.htm

Interestingly it's a mix of data sheet numbers - the lumens - and measurement - the candlepower

The lower measured number sounds like it accounts for losses from the theoretical LED output.


For a quick approximation, a 20 degree beam would have 1/4 the candle power of the 10 degree beam for the same LED output.
 
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Pair these with a good/cheap/quiet Wig-Wag controller, and man what a deal.

At that price, you could afford to try and see. Nice find.
 
Thats pretty interesting. I've long thought that the aviation LED's are criminally overpriced.
 
ColoRv said:
Thats pretty interesting. I've long thought that the aviation LED's are criminally overpriced.
Click to expand...
"Avaition" is like wedding or funeral, you add any of these two words to a set of flowers or cake, then two zeros gets added to the original price.
 
I just ordered two 5" modules.

They are back ordered till December. When these puppies land in my mail box, I'll fire them up and issue a pirep.
 
Spot or flood

Are spots and floods backordered till December? Wouldn't a spot make a better landing light? Just sayin'.
 
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There 8" module is listed at 3600 lumens, I wonder if that would fit in a standard duckworks leading edge mount (blank install kit)?
 
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