cfl grow month old

so i have this plant since nov 27 very bushy and short under two 6500k cfl's on a 18/6 light but now i can tell the leaves are slowly losing the dark green color and turning yellow one by one slowly i thought it was heat so i moved it but not sure so i went to straight water no nutes...i dont know what to do

Can't see too clearly from the pics, all I can see from pic 2 is normal lighter coloring of new vigorous growth! Are you referring to that or are the fans yellowing? Often at lights on, top growth can appear slightly yellow, but you must resist the temptation to feed if thats the case, its perfectly normal. Again after a good watering you will see that too for a day or so and they green up as the soil dries out gradually.

If the fans are yellowing from the bottom up then thats different but I dont see that from your pics?

Can you get some better pics maybe? or describe your watering/ feed regime?

Nice plant btw