if you spend 30 bucks on an hid system its junk. but a hundred bucks or so should get you a ballast and older air cooled hood and bulb. but it gets you on your way to better buds and yields. i repeat dont spend 30 bucks on an hid system. also avoid wire it yourself ballasts. most people fuck the wiring up. a good hid system will run about 300 bucks new just for the hood and ballast minus a bulb. unless you order it online. then you save a third on equipment costs when buying new. craigs is a good place to get used cheap stuff.100 bucks for th 400 watt hps?? so the ones at lowes for 30 dollars isnt good or something????