LED - light emitting diodes - bulbs are becoming more popular for using in home lighting. LED bulbs last between 40,00 and 100,000 hours, use very little energy, are cheap to run. Brightness measured in lumens and lux. Super bright leds compare favourable with halogen and standard bulbs and give 80 lumens per watt of power. Led bulbs give good directional light and good for lighting shop windows, decking lighting, and lighting swimming pools.