600 Watt HPS over a Waterfarm. Please tell what you think or what I should change. and finally, about twenty pounds worth of shit above my light. Can someone tell me if this is safe? I think tomorrow when I get home from work I am going to clean that shelf off and hang the light from the ceiling. Good or bad? Also, I plan on putting the balast and air pump on top of bricks. Good or bad? I didn't think I should hang the balast from the wall.