DC 7-30V Bi-pin G4 LED lights, the connection pins exit back of lamp. Its energy saving and long service life, High brightness, low electricity consumption. The connection your electricity will be cut down sharply save 70-80% electric energy than incandescent lamp. Widely used for indoor lighting: Hotel, restaurant, shops, business lighting, also suitable for cars, trailers/caravans, boats, yachts or ships.