I've already got that chart... solar light power conversion i pretty simple (almost linear), it is about 60000 lux ~ 100W/m^2 of light power (so 600 lux ~1 W/m^2 with this curve), HPS lamps have a pretty different light curve... using clorophyll absorption i'll do some brainstorming on the matter.

By the way, high efficiency led have a rate of 80% light conversion, some even striking the 93% rate, that means, to have a light equivalent to the sun, with a full red-to-blue spectra, will use 120-130 W of white LED. Equivalent to 60000 Lux (60000 Lumens /square metres, about 7000 lumens /sq foot). Too bad they are mostly super advanced leds, commercial ones will have much lower efficiency.