Reflectors?

I have the ability, machinary & material to fab any reflector ...what is optimal?

 

I'd say footprint and lumens measured at the footprint. Direct radiated light produces max lumens at an angular infall of vertical. Any angle greater then the vertcal reduces efficiency and your most efficient reflector will produce greater lumen measurement then the one to which it is compared at the outermost points of the footprint. So you need to experiment but this is your standard. b1

 

copy the daystar a/c if you have a small area.
coolsun for larger ones.
my opinion is if it is not aircooled , it's not going to work for me, but of course i live in a desert.