@oldestschool I got them on Amazon.. I started this run of autos with GH. I went pretty light in the beginning but now in mid flower I’ve increased quite a bit with no burning. Will probably start the next run with a more aggressive feeding schedule. No complaints so far. Actually, I wish I had bought the gallon jugs..

Right on, one less thing to worry about. Lol. Thanks for the replies.

Careful with that thing. 730nm will cause a similar reaction within the plant as being in the shade and cause cells to elongate. This is how branches can bend toward the light. The side of the branch facing light will have normal cells while the shaded side’s cells elongate causing a bend.

There are deep red (680nm photosystem !) and far red (700 nm photosystem II) and infrared (700-3000nm pure heat). IR is pure heat doesn’t activate any photosynthetic activity.