These are high quality T10 W5W 501 LED wedge bulbs containing 3 SMD chips each to replace standard bulbs and customize a car's look. They are designed for European vehicles and include load resistors to prevent OBC errors. Each bulb uses 3 ultra-bright SMD LEDs for white light with immediate on/off response from 1 forward and 2 side firing LEDs. They have a long 100,000 hour lifetime with low power consumption and no heat output.