Here is what you can read in MrR-16XR reflector description :
"Specially designed 16mm Reflector for the Cree XR-E. Works with 7-up which is coming soon."
What is that 7-UP?! Will it be a heatsink for seven XR-E emitters? For Mag modding? Some other animal? When is it going to be released?
Just to give you an idea, seven P4 bin XR-E running at 700mA will put out about... 1000 lumens