I used halogen bulbs and they are a very cost effective method for discharging LiPo's (even to this day), though many folks are using resistor banks these days, in fact I currently use a resistor bank for cycling my packs for stock racing, though there is no difference between a bulb or resistor bank with regards to LiPo safety, you just need to make sure the draw is shut off at the appropriate voltage setting. I currently use an iCharger which adds all the safety features to make it very simple and safe, I only use resistors because they are a little smaller though they produce about the same amount of heat.