I have 5 of my trees small which were airlayered last season. I brought then inside the basement Dec first where the temp is 65 but no lights. The trees started blooming new green leaves in late Dec. I provided them with growing lights which put 4500 lumen and left the lights on for 24 hours to provide some heat. I noticed some leaves are wilting up. I thought may be too much lights and expirmented by turing the lights 8 hours a day and on for 16 hours. I am so pleased, in three days all the wilting went away and the leaves look very healthy. We have unusually warm winter so far. It was 55 today and if it continue and go to 60 I will take them out in February. I don't think the fig can produce under growing lights it needs sun.