Moonshadow
Enlightened
Fair enough - the 139 lm/W is indeed at 350mA - so they are going to have to overdrive it a bit more to get to 500 emitter lumens.
I've just seen the video, where David says they are running it at 1.5 Amps. Wow !
I've just seen the video, where David says they are running it at 1.5 Amps. Wow !