3 or 4 Cree XR-E R2 MR11 kit??????

[MrSpock]

I know KD info is not really all that accurate but the diminishing returns in terms of lumen for more power are correct. That is all I was really trying to point out.

I think we can both agree that the right choice in driver/ battery voltage is probably the main consideration in efficiency. But running the LEDs at a lower current does increase efficiency and also the life span of the LED. But lets face it the life span of the LED is not really the biggest concern is it.

Sure!!!

The lifespan? Of course it's important! Don't you want your grand-grand children to use the same light you built yourself with this old, barbaric, and inefficient technology they called LED and used in the beginning of the 21-st century?

 

[CBR-runner]

That's funny. I'm still working on a 3 ssc p7 setup and a 12v battery pack. I'm hoping It works out ok.