Id agree im flowering with bs right now and they seem to be doing fine!These have been out for awhile now, no excuse for "not strong enough for flower" nonsense. Other brands do as well.
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The buds near the bottom get 725 umol and the top is 875 umol, limited by nutes at the moment. HID/HPS ran 950 umol on top and 400 umol on the bottom. The HGL lights totally put more light on the plants with better penetration. I use meters and measure the light, I do not guess.