I don’t have exact numbers but mine are just happy around 100-125. They won’t come out if the light is too strong and bleach quickly. They usually recover quickly but they never seem to regain all of their color. Reds can handle more light it seems. I have never had a Goni change to an ugly color under low lighting but I have seen many bleach or be super pale from too much light. I have a monster sized Alveopora sitting at less than 50 par for the last 3 years. I like to target dose roids once a week idk if it works but they react and get all swole and seem to absorb foods, that’s what It looks like anyway. Lower light the better. I wonder if one of the reasons we struggled with Goni’s back in the day was because we gave them too much light. I know I never really had success with them till I switched to decent LED’s