Red XP-E vs XP-E2

[Lexel]

Djozz tested those LEDs

4 emitters tested: Cree XP-E2, JR 3535, small die Nichia 219B, Luxeon Rebel lime colour

Four emitters were tested on direct-thermal-path MCPCB's, three white 3535 leds of comparable die size, and the new Rebel in the colour lime. Current, voltage and light output was measured using a laboratory power supply, a cooled copper mount and a home made integrating sphere (the set-up was as described in my XP-L tests): A Cree XP-E2 R3 1D, obtained from illumn.com A chinese 3535 size (XP footprint) cool white led branded 'JR' obtained from dx.com A Nichia 219B 5700K led with a smaller xp…

He measured max. lumens on DTP on a CPU cooler at 2.1A

So I would guess driving with 4-5x7135 would be OK in a flashlight