They do have smaller wattage HPS that screw into a regular socket, I would see the value in these as support lighting. You can get small 250 watt HPS systems for pretty cheap, like under 100 diollars, or if you want to spend more 400, 600, or the big daddy, the 1000 watt. There are Hydro shops and such that sell these lamps on ebay, or if you have a local hydro store.