Quote Originally Posted by cigarettes42
honestly your problem isnt the temp of your light. plants can grow in any kind of spectrum. its just that each color produces differently. old schoolers use to grow with 4ft cool white florescent bulbs. i noticed you didnt fill any ts form. that would help. but noticed your purple stems. that could be caused by a cold grow room. if the room is to cold it will hinder its growth.
i will agree that room temps could be a factor...but if you check the wavelengths of light that are used for a plant to make photosynthesis you cannot grow under any spectrum of light!!!! MJ happens to be a very hearty type of plant that can be grown under poor lighting....the better your light source the better product you will produce!