Cree XR-E and XP-E / XP-G LED size comparison

[dtiydr]

132L/W.. thats just insane..

[neondave]

Where is the best place to buy these LED's ? Also, I allways hear about 'Driver boards' , But cant I just use a simple resistor to limit current ?? I want to retrofit one of these into my Ol' chrome 'bullet' style bicycle head light , I was gonna hack my new Lows 'Taskforce' , 2 C cell flashlight to get the bulb, but , maybe not

[mgs1983ai]

@neondave What do you mean by "best"? Best price, try Deal Extreme. Allow two to four weeks for delivery. If want a good selection with higher lumen bins, try LED Supply. That's where I buy mine. As for the driver. If you plan to power an XP-G or XM-L at a low current (under 500 mA) with some alkaline batteries, you could get away with just a heat sink. If you want to power these above 500, then I suggest a constant current driver. Some can be picked up for as little as $2.

[HaloHamstur]

They need smaller plates

[ecotts]

I agree with previous poster, thanks for sharing you knowledge buddy...

[tatarhead]

Thanks for sharing your knowledge...

[tycoelectronics]

Check out the Solderless Socket Solution for the CREE XLAMP® MP-L™ LED from Tyco Electronics. There is a get video demo at youtube.com/user/tycoelectroni­cs#p/c/3BA0D4D776A447EA/0/Lqlr­z1szBcs

[JP95ZM6]

Nice comparison, thanks. Would be interesting in the future to know if the driver requirements are different, or the beam angle and reflector requirements, too. Thinking upgrades.

[diodepack]

130+ lumens/watt?!!!

[DanFrederiksen]

@diodepack yeah Cree XP-G has blown everything else away.

looks promising

[powermaks]

@diodepack the new XM-L LED is 160 LM per watt (at one watt) and 100 lm per watt at 1000 LUMEN'S

[diodepack]

@powermaks just crazy! photonics and solid state research is advancing so fast!

[luckyfire3]

i'd love to see those in use.