just get them outside asap. I liked starting seeds under a 96w 2' 4 bulb T5, until yesterday. I got a cool new light meter and put it 2inches under the T5 with only 2 bulbs on (48w), 1950 footcandles. I then took the meter outside, waited for the clouds to part for full sun at 2pm, and damn, 11,500 footcandles! so have a timer that turns the t5 on at sunrise and as soon as the outdoor temps clear 60F, out they go until dark, then back inside til morning while its cool out at night. youll never have to harden them off and you still get the suns power.