Changchung
Flashlight Enthusiast
Hi guys, I am waiting for a 18650 based flashlight to make it a mod, I want to put in there a XM-L Led and drive it with 2.8 amp but I am concerned in that it can generate a lot of heat, my question is, with which Led can I get more lumen drive it with 1.4 amp? A XM-L or a XP-G?
My others concern is about the runtime...
I was thinking in:
1º drive the XP-G with 1.4 amp
2º drive the XM-L with 1.4 amp
3º drive the XM-L with 2.8 amp
This is the victim
http://www.dealextreme.com/p/trustfire-tr-801-cree-q5-wc-230-lumen-led-flashlight-1-18650-13095
Thanks, feel free to make any comment...
If lumen output is the only concern, definitely go with the XM-L. According to the Cree data sheet and the B&L doc's, An XP-G R5 @ 1.4 amps has an output range of 442-470 lumens and draws 4.9 watts. The XM-L T6 @ 1.4 amps has an output range of 515-552 lumens and draws 4.3 watts. That is of course just an extrapolation and a YMMV type of thing. The one thing those numbers don't suggest is the XM-L has twice the surface area of the XP-G. To get more throw, an XM-L requires a larger reflector. Or if your 18650 host has an MOP reflector, the XM-L might win on sheer output.
My others concern is about the runtime...
I was thinking in:
1º drive the XP-G with 1.4 amp
2º drive the XM-L with 1.4 amp
3º drive the XM-L with 2.8 amp
This is the victim
http://www.dealextreme.com/p/trustfire-tr-801-cree-q5-wc-230-lumen-led-flashlight-1-18650-13095
Thanks, feel free to make any comment...
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