I have been doing a lot of research on LED grow lights, and I think i know why a lot of them do not work. Most of them do not use far red at all, and most of them have one set ratio of blue to red. From what i have read during the vegetation stage the red to blue should be 2 to 1 and during flowering the red to blue ratio should be 6 to 1. I have read about experiments using filters to filter out far red out of natural sunlight. The experiments concluded the plants under the filter were shorter and stockier, and the ones which were not filtered were taller, but both plants had the same amount of flowers. This could be very good for growing marijuana. But, it is my understanding that plants need far red light to flower and bud. I have red that far red light induces flowering. I have been doing research to try and figure out a way to build a better LED grow light. I have figured most of it out except the far red. I have read Marijuana plants also us UV light for resin production. I am thinking of using some 6500k white light to help with this. The LED light i have designed is 48 inches long and 26 inches wide it has 12 rows of lights space 2 inches apart. The lights are all 1W. 16 white 6500k, 72 blue 470nm, 30 orange 612nm, 42 red 630nm, 72 red 660nm and 40 far red 730nm. During the vegetation stage, and through the first week of flowering, I will shut off the 40 far red lights, making a 2 to 1 red and orange to blue ratio. For the rest of the flowering stage I will shut off 42 of the blue lights and turn on 40 far red lights making a red and orange to blue ratio of 6 to 1. Does anyone know anything about red and far red ratio? Is my light ratio correct? Or should i not even use the far red lights at all?