Any HPS bulb will require a special type of base/fixture and power regulator. The power reghulator for HPS (and MH) lights is usually called the ballast. These types of lights must have very constant energy flow to their bulbs. A sudden change in energy will cause the bulb to short out and, possible, break. So to use an HPS bulb, you must use a HPS ballast and fixture. You'll need to go to specialty light store for this sort of thing, or order it off the internet (ebay.com.au should have some). You should be able to find a 400w setup (bulb/ballast/fixture/reflector) for around AU $175-200.

As for the bayonet CFLs...sorry, I don't know how you'd get multiple bayonet fixtures. You could try to find the equivalent of the outlet/bulb converters sold in other countries. Just go to a hardware store and ask about an item that has a plug on one end and a bayonet socket on the other. If you've got four of those, it shouldn't be too hard to rig some sort of lights.
Roughrider Reviewed by Roughrider on . Answers about CFL, HPS, How Much Light... Although I'm still kind of a new poster, I keep seeing a lot of the same comments--many of which are answered an Dr. Khronik's excellent El Cheapo Guide to Lighting. But there are a few things I'd like to add in regard to watts, lumens, cfl, hps, and efficiency and how much light you need. Maybe this should be stickied? Watts have nothing to do with light or growth. Watts measure how much power a light fixture uses to produce light. You can tell how efficient a light bulb is by looking Rating: 5