31MM 6 LED 5050 SMD Festoon Dome Light Bulbs DC 12V - Red. This red car LED bulb is suitable to change out your map, door, interior, glove box, dome, license plate, or trunk lights. This bulb is easy to install (Plug-n-Play). Cross Reference include DE3175 DE3022 DE3021 D3175 3022 3021 3175 6428 6430 6461. Bulb does have positive and negative polarity. If it does not work, try flipping bulb.