PowerVEG FS-UV is different than other T5 lamps. Not only does it produce a well balanced spectrum for your plants, it also provides UVA and UVB. UV is an essential component of the spectrum that produces stronger, healthier plants, allowing them to produce higher quality fruits and flowers. The sooner you introduce UV to your plants, the better your end product. No other T5 bulb on the market produces a spectrum with this quality or UV of any kind.