G4 Socket: With standard European G4 base, easy to install and replace incandescent bulbs. 2W LED Bulb. The light efficiency can reach 90%, so it is very energy-saving. Durable, their lifespan is three to four times longer than that of a traditional halogen lamp. Environmentally friendly: No lead or mercury, no UV or IR radiation, CE ROHS certification, 3-year warranty, Long lifespan up to 20,000h. Suitable for track lighting, chandeliers, wall brackets, sconces, RVs, marine boats, yachts, etc.