Hey man, i used also t8 light on my first indoor crop, had 3 racks, each had 2 bulb, each 58 w...I vegged for month and a half, and the flowered for 10 weeks...also added on 70 w hps and 6 cfls, 26 w each, and my widow yield was very nice indeed, i was so pleased...you can easily flower with them with good results, just keep em close as u can and youl be fine