Your pic links don't work...
OMB Reviewed by OMB on . Yellowing leaves/browning tips!! Help! problems -- 21 days into veg I'm running 3 1350k lumen 23 watt replacement as well as a 2700k cfl bulb in a grow box, temps been kept between 72-82 for the past 3 weeks (It spent about a week in the 80s while i was getting ventilation figured out). The temperature has been fluctuating a lot and im using FFOF for soil, no nutes added yet. Plants transplanted about 3 days ago. The browning on the tip occurred on only one leaf, which I found kinda strange. Here are the pictures. Rating: 5