Well, i had the 4ft'er on all night and was expecting quite a change in the plants in the morning from having those shitty lights on earlier, but when i checked them this morning there was no change, only 1 had stretched badly for the light (this is probably because the lights like 15-20cm away from tips of plants.... would lower it if i didnt run out of chain!) but yea no difference other than that. The grow room's also at a low 15 degrees celcuis which is too low.... hopefully that'll change up to 20c or so with the other light on Thursday or so...
Jdog, you use 4 5ft tubes? are they double-tubed or just single? and how much watt'ers?

will take pics soonishimp: