This light on its first grow produced 1.5g per watt. The reported wattage is 400w but I measured 350w which was ideal for my small tent. Heat could be an issue if you do not have variable speed fans that can be adjusted to vent the heat as required.
The plants gobbled up all it had to offer and were super happy all along the way.
I finally feel I'm giving enough light in my flower tent
EDIT:...until a coupla minths later when 2/3 of the diodes have burnt out...no more Phlizon for me
Wer nicht so extrem viel Geld ausgeben will/kann ist hier sehr gut bedient. Die COB's haben eine extreme Tiefenwirkung.
Und der Ertrag kann sich auch sehen lassen!