This light has 4 different settings (25%, 50%, 75%, 100%).
This light has 2 different modes ( Veg, Flower).
I set this light at 15" above canopy.
This light has been on since 0600.
I took the following readings.
VEG at 25% this light produced 23,500 LUX or 551 Umol/s/m2
VEG at 50% this light produced 37,500 LUX or 863 Umol/s/m2
VEG at 75% this light produced 51,000 LUX or 1173 Umol/s/m2
VEG at 100% this light produced 60,500 LUX or 1392 Umol/s/m2
FLOWER at 25% this light produced 21,250 LUX or 489 Umol/s/m2
FLOWER at 50% this light produced 34,900 LUX or 803 Umol/s/m2
FLOWER at 75% this light produced 47,000 LUX or 1081 Umol/s/m2
FLOWER at 100% this light produced 55,000 LUX or 1265 Umol/s/m2
So if you agree that Seedlings through VEG, a cannabis plant needs between 8,000 to 13,000 LUX and between 10,000 to 30,000 LUX for Flower, You can also agree that this light is more than capable of giving your girls more than enough light to grow tight nugzz.