I'd like to be able to add t5's again, but cab size won't allow it. Amare has a model with a small UVB bulb in the middle, but it's like $1200-$1400. When I've used UVB bulbs from POWERveg, the plants were quite a bit frostier.Hi Tetra, Our lights only contains IR, but no UV, uv lights are too strong and debatful whether it is helpful for growing, so we don't use it. If you want t use the UV, you can add some T5 as compensation. As far as I know, some other lights with UV, also just add the T5 tube.