Long-lasting energy-efficient LED - no bulbs to replace. Shutter mechanism inside the receptacle blocks access to the contacts unless a two-prong plug is inserted, helping ensure foreign objects will be locked out. Two LED Guide Lights use less than 1 watt. Light sensor provides automatic ON. OFF features. Self grounding clip. Fit in standard wall boxes. Can be side or back wired. Complies with Article 406.11 of the 2008 NEC Code.