Thought it might be fruitful to have a far red thread. There are a couple uses for supplementing far red I've found so far. The Emerson Effect states that a combination of 640-680 and 735nm light will produce more vegetative growth than an equal amount of 680 alone or 735 alone. Has anyone tested this out or incorporated far red into their spectrum? I'm wondering how this works out in a full spectrum environment and if far red supplementation would be worth the electricity involved. It's stated that the red to far red ratio in sunlight is 10:8 so I'm not sure if it's practical to implement something like this. I've also read that people will use far red at the end of a light cycle to cause the rest period to onset sooner, perhaps achieving a 14/10 flower cycle. One paper states far red at dark onset promotes stem elongation. Parts: There are a couple far red COBs I've discovered on the internet. There are 50 and 100w square cobs that can be found on ebay. There are also 10 and 20w units made for CCTV cameras, and while it's called infrared it also states the spectrum as 730nm. Search: 20W 730nm Infrared IR High Power LED Light Bulb Lamp For CCTV Camera Those units operate at 17-20V and 700-1000mA so could easily ran in series with meanwell or other brand drivers.