These are 2 weeks old to the day and I have had no problems yet. I have 2 x 1100 lumen daylight CFL and 1 x 1700 lumen daylight CFL on 24/0. I don't nute because i put them in miracle grow... i have to be very careful not to over water or the time release nutes will burn them =( so i end up water about every 2-3 days (when it dries 2 inches down.) I plan on letting them grow for about 6 weeks then sexing some clones to see if I have a momma =) I will get more lights in a couple weeks and then several more soft bulbs when it comes time to sex. I just started LST today.