I do however know that a plant will pray like crazy 6-8" away from a quantum board as well, even though its burning the shit out of it in the process. Had a blackberry gum that had stretch off the chain and it was at its most insane paying angles when 6-8" away from a 240w quantum board. It was probably 1800-2000umol/s, 42c and detrimental but the plant seemed to like it until it liked it too much, bleached and dried up on the tips, leading me to get a new tent.
Its great until it's too much kind of thing if you know what I mean. I have seen guys/girls on here with some insane praying coming from 300-350umol/s in veg, whereas I usually need a decent amount of light to get happiness and don't get praying until pre flower and 500umol/s and up. I mustn't have them running anywhere near as efficiently as living beings lol.