I am strongly considering using 55 watt or even teh 100 watt halogen sized auto light bulbs, or in a fog lamp style, for outside flood lighting... The basic wiring and fuses/swithces are easy enough...but I have 2 concerns: 1) the wire size needed to go any distance ( I've seen 12 ga 2 conductor "zip cord" (household extension cord ) do just that, it burnt like a piece of cannon fuse, when connected to a headlamp some 20 feet away from the battery!! 2) a sensor or some device, to "trigger" the lamps !?? Anyone? I can do basics and even 240 volt single phase wiring, but, 12 volt dc is a different cat due to the very nature of the wire sizes needed-resistance issues? And to have a 12 volt system entirely independent of solar or invertors... I can easily get the golf cart 6 volt hi-amp batteries and run them in a series connection, to get the 12 volts needed....the main drawback is that all the units I have found commercially available, that are 12 volt rarely exceed a 33 watt lamp and it's generally a fluorescent tube! Not what you'd need to illuminate a good sized area in total darkness. Most of them have a range of only 15-30 feet also! I need something with a bit more ILLUMINATION! I can easily set up fog lamps, that are sealed from water/rain/etc, in single or pairs, and IF the wire is kept to a minimum distance from the lamps, I can get away with a wire gauge of about 14-16. Or, I can easily use "jumper cable" wire sizes in the upper gauges of 8 to 4 gauge wires.