5w 12v LED Light Bulb for use with GEO Lighting Kits. LED bulbs for use with 12v DC Systems. This LED light bulb ESE27 Screw Fitting is ideal for systems that require enough light to work by for long periods of time. Equivalent of a 65w standard household bulb. So not only are these LED bulbs exceptionally bright but they use a third of the power of a fluorescent bulb, are far more robust so less prone to breakages and have a far greater life expectancy. All this and they only use 5 watts of energy per hour they are used.