LED SMD Car Dome Interior License Number Plate Light Bulbs Festoon NB. The bulb has positive and negative polarity and will need to be fitted the correct way. Voltage: 12V: for Cars, Motorbikes and Caravans 24V: for Lorries, Buses, Vans ans Trucks Power: 1.5W Very low power consumption and long service life. LED Type: 2, 6, or 16 LED Length: 30mm, 36mm, 39mm or 40mm Colour: White, red or blue Quantity: 1, 2 or 4 Replaces part numbers: 40mm -44mm : 211, 211-2, 212, 212-2, 214-2, 569, 578, 6413, 6429, 12844, DE440 36mm -39mm : 3423, 3425, 6411, 6418, 6423, 6461, DE3425 31mm -35mm : 3021, 3022, 3175, 6428, 6430, 6461, DE3021, DE3022, DE3175 Can be used as a dome light, interior light, door light, map light, footwell light trunk light, backup light, courtesy light, license plate light, instrument cluster light etc