The graphs sell the LED's themselves. Urban grower has an article showing the same graphs and the average spending cost of both HPS and LED and its swaying me towards LED's day by day. Ventilation is getting expensive these days.
jtsik330 Reviewed by jtsik330 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