you have answered your own question.....this is why LED's are more efficient with more than 80% of the light used by the plant and HPS only about 20 - 30 % of the light absorbed is actually used...this is why less wattage can match production of HPS...LED's hit the main lighting wavelenghts with little energy wasted:smokin:

not to mention the energy for cooling costs...thats why it takes 1000w HPS to get good results!:thumbsup:
stra8outtaWeed Reviewed by stra8outtaWeed on . Importance of 460nm red LEDs? Here is something very confusing to me. Many LED proponents loudly proclaim the need for 460-470nm red LEDs over the cheaper 630nm LEDs. I understand that this better coincides with the accepted chlorophyll B absorption peak. So far so good. LEDs veg very well given appropriate wattage & color. So far so good. LEDs do not compare (generally) to HPS flowering as far as yield. (Please - let's not go off in that direction here. Thank you!) Rating: 5