The 12 LEDs are arranged on and around the end. These G4 miniature LED bulbs are designed to fit lamps fittings that are too small to convert to other LED bulb types. Light output is similar to a 5 watt halogen. These high quality SMD LED replacement bulbs save power. Energy efficient, they last up to 50 times longer than a standard bulb. The latest SMD chip technology is used that provides the highest light output to consumption ratio available today.