Lux metres aren't that accurate with led lights. 30k lux under my 550 is enough to cause bleaching in certain strains
It was that pics that made me think the light may too strong. Yeah lux doesn't read everything but 20 is double 10 and such so it gives you something to compare if everything gets fried at x then try 1/2x kinda thing... IMO l lux meter is comparable to the best ppfdppddtfq2 or whatever because if the lux doubles and the PPFD doubles.... woldnt it simply be a convertion? Like if lux only read visible light and PPFD reads alll the spectrums of light that the plants use and gives them ratios ect .... but the spectrum of your light wopnt change from minute to minute so for me functionally they are identical unless you travel around and read many different types light spectrums and not just the same one everytime.
I think that flowering with 75k is crazy way too much ... some pple do it but it think its overkill tell you the truth i flower with less than 30k and never had any signs of slow growth or low light ect
If you get 10'000 lux and ex 500 ppfd or whatever (not sure whatr real numbers are)
Move light 20'000 lux and ex 1000 ppfd ....... <--- why would anyone say lux is irrelevant? If you told me how many km it is it could be converted to miles right? Maybe I'm missing something but when I started out I was running like 25'000 for veg and had smaller plants that grew slower now I veg atr 8'000-10'000 and the tent fills up in less than 4 weeks with big plants... I was giving way too much light and the meter gives you a standard.