I was lookin at home depot.com to price out some bulbs and this is what I found. Philips Ceramaluxâ„¢ 1000 Watt Clear High Pressure Sodium Bulb Model C1000S52/ALTO Price: $51.15/ea Does this sound right? Its without the fixture. Im going to be growing 4 plants in a small grow space. I dont think 4 plants need 1000w hps bulbs...but the price doesnt sound right.