cob led heatsink cxb3070

Hey guys, I calculated this heatsink to about 1000/in^2 @ the current 36" length and 4 3/8 width. 14 fins -1 inch per side = 28" 3/32 inch fins x 14 = 1.312" spaces between fins 0.24" x 13 = 3.25 = 32.56/in^2. x 36" = 1172 in^2 total. 1172 / 6 = 195w active cooling 1172 / 16 = 68.9w passive...