WHITE 20W LED

[Z'mnypit]

Has anyone used one of these?

http://cgi.ebay.com/WHITE-20W-LED-1...tem&pt=LH_DefaultDomain_0&hash=item35aab214b3

Ive got an ryobi 18v flashlight laying around Im thinking about ordering one for. Just wanted some thoughts befoe I order one. There is also a 2000lm version but its $40 more

 

[DM51]

Welcome to CPF, Z'mnypit.

I'll move your enquiry to the LED emitters sub-forum.

 

[blasterman]

This is a 'Semi' class LED. I have blue versions and the same factory just made me a 445nm 10watt version that's pretty neat.

Provided you can handle the current, you'll either set your flashlight on fire or just burn it up. At full power these emitters require about 100sq inches of heat sink area - bare minimum.

 

[zxcasd]

Has anyone used one of these?

http://cgi.ebay.com/WHITE-20W-LED-1...tem&pt=LH_DefaultDomain_0&hash=item35aab214b3

Ive got an ryobi 18v flashlight laying around Im thinking about ordering one for. Just wanted some thoughts befoe I order one. There is also a 2000lm version but its $40 more

One word: don't. Why? BridgeLux blows these things way on the lumens-per-dollar scale. Look at the BridgeLux BXRA-C1200, and then look at the "smoke test" I performed on one on my blog. The result: The rated typical output is 1320lm at 13.2V/1.3A, for $13.00 from Element-14. Your Chinese one claims 1500lm at 20W. Not only are the Chinese manufacturers known to exaggerate their lumen claims, but in this case you can see plainly that the wattage is only in the absolute best-case scenario. The text of that item claims 15-18Vf at 1400-1800ma. 15Vx1400ma = 21W. Worst case scenario, the other end of that scale, is 18Vx1800ma = 32.4W! For 1500lm (even if I were to believe that)? For $23?

If you want to read the full results of my testing on the C1200, you can do so here under the LED category.

Tom's Blog

Take care!

-Tom