Check this thing out. This is a discharger for the high-voltage battery. You can build something that will work with just two lamps and some high-wattage incandescent bulbs, but I had to make mine look cool. I took an old PC power supply, removed its guts, and constructed this. It has two 50W halogen bulbs inside, and a holder for a 300-500W halogen bulb. The power for the case fan is also wired up so that when plugged in it should run the IMA fan.
Round switch is for the 12V power -- fans and ammeter.
Double switch is for the 50W halogens -- run one or two.
Single switch is for the 300-500W halogen socket, but I haven't put a bulb in yet.
Basically you start with the super high wattage bulb then after a while you switch to two 50W halogens and then after that you go down to 1 50W halogen.
Maybe later I'll re-wire it with some relays and have one of my Arduino Nano clones programmed to do everything automatically.