It depends on what kind of yield you want out of your beauties. I PERSONALLY wouldn't stick with that bulb, as it is unefficient, compared to fluorescents. A couple of CFL's will suit you better. If you wanna spend a bit more money and time, go with a PL-L fluorescent setup, that's better too.
WeayLay Reviewed by WeayLay on . First time grower need help ok so this is my first grow and most of my plants are outside but 2 of them are inside i have 1 120 watt http://www.acehardware.com/product/index.jsp?productId=1287909 i only bought one and is that enough to grow through the whole cycle also it has a blue top on the bulb thnx. Rating: 5