Too much light?

normal target is 1g/W can you pull 200 g from each girl to justify so much light ? Theirs plenty of simple explanation what Dli (how to count it) plants need, you can go this most acurate way. i ran now 300w in 120x60cm tent, dont need more for same 3 plants and will pull 1-1.5g/w easy.

umol/s per sq ft... add up the lights, devide by sq ft of coverage (hopefully related to chosen hangin distance, i.e. geometry of the context). multiply by 10.76ft^2/1m^2 and reference a DLI table with your "PPFD" you just calculated. IF DLI is above 35-40, it is possibly too much. Simply observe resulting internode lengths for fine-resolution once in this ballpark. If notdes are too tight, it needs less. in flower you'll see pistil burning up (yellow nubs). Advanced light issues will cause burning on leaves between veins at first and quickly get worse. Bleached buds is also a symptom to watch out for. Droopy AF for prolonged periods of time near end of light cycle is another symptom. They will scream "TOO MUCH LIGHT" in obvious ways.. in my opinion, don't blindly use 3 lights. Take theh area of coverage and work backward from 35-40 DLI to determine how many umol/s of light you should target. Compare spec sheets. consider different combinations based on that as well as distribution of light and make the best choice. 40 DLI safely overshoots "max" and likely needs 5-10% less than that. This is for ambient co2 and loosely controlled environment avoiding extremes. you can go as high as 55-60DLI if adding co2 and tightly controlling environment. It's not a proporitonal return on yield for the increase due to some portion of diminishing returns being involved. But supposedly can get 25-33% more yield, ceteris paribus