SOCAL-LED 2 x 4210 42mm Festoon LED Bulbs Canbus 6W High Power Bright SMD 5730 Interior Dome Light, Map Light, Ice Blue (Teal) Our 42mm Festoon LED bulb is powered by 6 High Power Efficient 5730 SMD chip, super bright in small size. Ideal for Dome Light, Map Light, or License Plate Light Replacement. Our 42mm led bulb comes with built-in Canbus decoder chip error free for 90% of the car and truck. Unique design alluminum Alloy Housing helps keeping it at a low working temperature, avoid damaging plastic parts around. Directly plug and play for most vehicles, easy installation, instant on. 40mm-44mm LED Bulb Cross Reference Number: 211, 211-2, 212, 212-2, 214-2, 569, 578, 6413, 6429, 12844, DE440