G means the type of lamp holder is plug-in, U means that it is a U-shaped lamp, and the number shows behind indicate the distance of foot hole center (generally in mm "MM"). So the foot hole distance of GU5.3 LED spotlight is 5.3mm, with plug-in lamp holder. When it concerned to LED spotlight, it is diverse in lamp base and lamp housing. So there are item of AR111, MR11, MR16, E14, E26, E27, GU10, B22, etc. Besides, there are PAR20, PAR30 and PAR38 models. GU5.3 LED spotlight is a new sort of LED spotlight adopts GU as lamp base. These surely result in a beautiful and elegant appearance. It has aluminum-alloy lamp housing for superior heat dissipation. These make it energy-saving, environment-protecting and long lifespan. In contrast to traditional halogen lamp, this kind of GU5.3 LED spotlight is characterized by no noise, no flickering, anti-shock, anti-moisture, impact resistance, shock-proof and no warm up time required. It uses pure aluminum house with high transparent PMMA lens. In addition, advanced constant current driver is applied in the LED spotlight for its stability and security. They are popular in factories, gymnasiums, yards, advertising boards, buildings, lawns and garden designs and place where spot lighting is needed. Indoor spotlights are designed as replacement bulbs for indoor supplementary lighting, especially for supermarket, counter, cabinet, hotel, and cafe.