hey m8, yeah was lookin at similar type thing in da argos catalogue. Just discovered that the light i have is actually a tungsten halogen, which apparently is shit for growing, wastes money and gives out serious heat. I'm kinda lucky cos i have access to building sites with loadsa free materials, including lights. Gonna try getting a HPS for flowering, hopefully no more worries with heat up there once i build the box. My plants are about a foot tall now, if i start to flower now, will i still have enough head room? (4foot).