its probably halogen flood light. which is no good for growing. when i started i tried to use a flood light from work. the plants were extremely stretched and stressed. you need to check into CFL growing. its the way to go when you start out. have a look on your light. if it says halogen its no good. not trying to rain on your parade just trying to pass on info so you dont end up with shit plants like i did, and have to start over.