olekingkole
Active member
Do you know how the UVB output of your t5 bulbs compares to halides? I've used a Solarmeter 6.5 to check Hortilux sodium bulbs and their UVB output is negligible. However, the Solistek 10K's read 2-3 at 6 inches, which seems to be enough to have some effect on trichome development. It's still a lot less than UVB levels around the equator. I'm wondering if your bulbs put out more UVB than the Solisteks?