12V LED Spotlight: These bulbs work on 12V AC/DC. Do not install the MR16 GU5.3 12V LED bulbs directly into the standard AC 100V-220V household lighting system, otherwise it may cause a short circuit or damage the bulb. Energy Saving Energy: 12V GU5.3 3W LED with 60*2835 SMD LEDs, 500LM, cool white 6000K with 120 degree light angle. GU5.3 12V 3W is an ideal substitute for GU5.3 30W halogen lamp, save power consumption more than 85%. Easy to Install: MR16 GU5.3 12V LED spotlight , small size (50x46mm), easy to install, perfect replacement for traditional MR16 GU5.3 halogen bulb. Instant lighting, no need to wait for the bulb to warm up. The average lifespan is 30,000 hours. Safety and eco-friendly: 50mm MR16 12V LED. This bulb is not dimmable, please do not use dimmers as they may cause flickering or noise. No lead or mercury. No noise or flicker. Ideal lighting for motorhome/caravan. Applications: AC/DC MR16 GU5.3 12V LED spotlight is ideal for accent or indirect lighting. Used for bathroom, living room, cabinet, foyer, hallway, range hood, extractor hood, showcase, bookcase, office, etc. Ideal for interior lighting for caravan/motorhome, photovoltaic system.