my bet is 'no'. The amount and intensity of light is not directly related to the weight of the harvest. There is infinitely more to it than that. Why choose the smallest watt value of lamp? As far as mixing the warm white/cool white in veg, I'd use mostly cool white with one warm white, if you wish. In bloom cycle you'll reverse the colors.
Also, with coco and perlite you're doing hydroponic. What is your feeding regiment going to look like?