CFL's can be as close as 3". Just thinking, Your used to faster growth so maybe you should get some foliar feed going on. Foliar feeding is how I maxed out my first grow. I used a very weak solution about once a day. Be always diligent though for nute burn signs. Starting with burnt tips, progressing to the sides of each finger, finishing with total destruction. care is needed for this. two bottles, one with plain water the other with the nute solution.
After the foliar feeding dries, it leaves a residue of any un-absorbed nutes, it should the be sprayed with plain water as a sort of leaf rinse.
It looks from the pic like maybe your suffering from some nute burn now? Are you using hot soil(high nutrient content)?
Zcomp Reviewed by Zcomp on . CFL Bagseed, Take 2 The 2 month old plant is officially dead :( But with death, there is new beginning...... my seedlings have sprouted! 4 or 5 little sprouts popped up today... unfortunately I only have room in my set-up for 1 single 10 inch diameter pot. Perhaps I will try to transplant or kill the 2 or 3 weakest and then leave the 2 healthiest-looking plants growing together in the pot. The seedlings are in the 60% - 40% peat moss and perlite mix with two 40 watt CFL's and one 23 watt CFL, for a Rating: 5