cciyu 31MM 12 Chips COB Festoon LED Bulb Replacement fit for Dome Map Interior Light Lamp DE3175 DE3022 DE3021 3024,4x White LED Type: 31mm Festoon 12 Chips COB LED Light Bulbs;Voltage: 12V Cross Reference: Festoon 31mm-35mm:DE3175 DE3022 DE3175 3022 3021 3175 6428 6430 6461. Only for DC 12V Application: Interior Light, Dome light, Map light, Door light, CargoTrunk light, Glove Box light, License Plate light ect. Low Power Consumption and Low Temperature;Easy installation, just plug and play. Please NOTE: If the LED does not light up, simply Rotating it 180 degrees (reverse the polarity)