Hmm, kinda thought as much although I was told otherwise by my friendly growshop owner. I was just kinda giving the light a trial run. I left the wardrobe doors shut (otherwise there's an orange glow coming from my window, bit suspicious) and it got very hot. It would seem no HPS anymore until I can blackout the room and keep the doors open with a fan blowing. I don't expect the seedlings to be fully out until the weekend (probably) so I could pick up some CFLs then. Will the CFL cause the plants to grow at the same rate. Cheers for your advice.