if ur a Brit....u can get ur hps bulbs that fit into a normal socket from here

http://www.bltdirect.co.uk/cat38_1.htm

if u get one...let the rest of us know what they're like

chonged Reviewed by chonged on . Compact HPS!!! I thought you people may find these interesting. Only come in 50 and 75 watt versions but would make some awesome supplemental lighting for the lower canopy. Might even work for your tomato plants HD. 2700-7000K. Screws into a regular light socket. Rating: 5