bwest
Well-Known Member
Wow, this square footage thing is really kicking your guy's asses. 5x3 is fifteen square feet. 4x4 is 16 square feet. square footage = length x width.
Cubic feet is length x width x height. I had my 11 year old figure it out for you. 20000 lumens divided by 15 sq. ft. = 1333 lumens a square foot.
You go by true watts on a cfl, not equivalent. Ten 100 watt equivalent cfl's at 26 watts is 260 watts.
Cubic feet is length x width x height. I had my 11 year old figure it out for you. 20000 lumens divided by 15 sq. ft. = 1333 lumens a square foot.
You go by true watts on a cfl, not equivalent. Ten 100 watt equivalent cfl's at 26 watts is 260 watts.