I have a total of 48" from cooltube to the top of container. The light is stationary. I was wondering if this will leave too much distance causing the plants to stretch excessively. I will be putting the seedlings in there after about 1 week under cfl. So when they are 12" tall, the tops will be approx. 2.5- 3ft. from the bulb. I didn't know if this was too far for a 600hps with reflector