Here’s the link to the thread. Start using DLI
What I do generally is put the lights high enough that the tops aren’t getting too warm - there can be a 10 degree difference between tent floor and canopy - and then just test for DLI for the number of hours I’m using. That seems to work out pretty well.
I had to reveg and forgot to change my Photone app from 12 hour to 18 hours and found my girlie was getting 120 DLI! Oops. I was happy I caught it in one day but I turned the intensity down asap.