Extremely Bright: Each 578 bulb has 7PCS High Power 3030 SMD LED Chips, 840LM/pair, clear view. 300% brighter than halogen bulb, offers a brighter and modern look to your vehicle. To ensure you get the right bulbs, please measure the halogen bulb 41mm or 42mm to confirm. Fitment: Lasfit 42mm Festoon Led Bulbs 1.65 inch replacing 12844 / 211-2 / 212-2 / 214-2 / 560 / 578. Perfectly fits for Trunk Cargo Light, Dome Light, Courtesy Light, Map Light, Interior Door Light, Glove Box Light, Vanity Mirror Light Canbus Error Free: 212-2 led bulb with built in resistor, solve the decoding problems of vehicles, no more having to hack your wiring to ensure you avoid "bulb-out" warnings, no more hyper flash. 1:1 Design: 42MM Bulb body is slim, sleek, super easy to plug in to housing, all you need to do is to remove the lamp covers and direct replace the stock lamps with LED lamps. The same 1:1 socket as halogen bulbs to ensure a perfect match with your car Efficient Aluminum Heatsink System: simple and effective heat dissipation and temperature control will keep your bulbs safe. Notice: Please turn off the power when replacing the bulb. ✱Extremely Bright: Each 578 bulb has 7PCS High Power 3030 SMD LED Chips, 840LM/pair, clear view. 300% brighter than halogen bulb, offers a brighter and modern look to your vehicle. Package includes: 4 pcs. ✱Fitment: Lasfit 42mm Festoon Led Bulbs 1.65 inch replacing 12844 / 211-2 / 212-2 / 214-2 / 560 / 578. Bulb body is slim, sleek, super easy to plug in to housing, all you need to do is to remove the lamp covers and direct replace the stock lamps with LED lamps. ✱Canbus Error Free: 212-2 led bulb with built in resistor, solve the decoding problems of vehicles. Perfectly fits for Trunk Cargo Light, Dome Light, Courtesy Light, Map Light, Interior Door Light, Glove Box Light, Vanity Mirror Light, no more having to hack your wiring to ensure you avoid "bulb-out" warnings, no more hyper flash. ✱Efficient Aluminum Heatsink System: simple and effective heat dissipation and temperature control will keep your bulbs safe.