Spot, here's some more food for thought re: Q4 vs. RB80:
https://www.candlepowerforums.com/threads/188124
I have a choice between an L0D RB80 and L0D Q4; it seems to be like the RB80's are far more efficient than the Q5's, but how do they compare to the Q4's? Based on
https://www.candlepowerforums.com/threads/175758
the rebel seems like a superior LED.
RB80 and RB100 seem to put out more light and last longer until 50% than the Cree P4/Q2