Agree with the too much light, 2 t5's about 2-3 feet above the clones would be plenty, and lower the lights right down on them when they root, remember if you give them too much light they will not root because they will try to photosynthesize instead. I cant agree with the temps that Ziggy posted, if I ever dropped my water temp below 75 I wouldnt see roots for weeks, if ever. I experimented with different temps in my cloner for years, and any temp below 75 is a waste of time. Sometimes I would try a lower temp like 68 and wouldnt see anything for 3 weeks, I'd turn up the temp to 75-80 and within 24 hours I had roots popping. I will say tho that every strain is different, I had 3 strains that I got dialed in and used for 5-6 years in the cloner at 80 = roots in 6 days..Other weaker strains or harder to root strains would get rot at 80. So experiment with your strain, start at low to mid 70's and go from there.