Today is the 2nd day of flower O had a bit of cold in the grow room last night and some of the fan leaves got cold stress but thats fixed now and shouldn't be a big of a deal. I will defoliate later down the road for now I will let them stretch and develope without stressing her more than needed.
@Lou_Grows, You're right. It was heat stress, I was pushing the plants as much as I could with a high light DLI and Co2, got very good fast growth around 28/29'C but started seeing stress up around 31/32'C so had to dial it back to 28/29'C.
I run a perpetual grow, the younger plants loved the higher temps but late flower ones didn't handle it well. In the end I've found that 27/28'C with 50-55% RH and Co2 is the best compromise for all the plants at different stages.