Standard 7443 LED bulb with high power 5630 33SMD LED, brighter than normal incandescent bulbs. Working voltage: DC 12, power: 3.6W, super bright with 900 high lumens. Size: 61.7mm(length)*18.3mm(base diameter) Compatible with the standard socket. Compatible with: T20, 992, 7440A, 7440AL, 7440NA, 7440, 7440LL, 7440ST, 7440NA, 7441, 7443, 7443LL, 7443ST, 7444NA, W21WUsed compatible with taillights, brake lights, reverse lights, turn signals , side marker lights, tail light, brake light, reverse lights and RV interior bulbs on car, SUV, van, motorcycle, scooter, trailer, RV, boat, marine etc. : 5630 SMD LEDs Quantity: 33 LEDs/bulb Lighting angle: 360 degrees LED life: 60,000 hours Compatibility replacement: 7443 7444NA Car use: tail lights, brake lights, reverse lights, turn signals, side marker lights, rear light, brake light. , reversing lights and motorhome interior bulbs, etc. Features: Easy to install bulb, plug and play, no wiring required. Point to point welding, light and firm structure, not easy to damage. Energy efficiency with new LED technology reduces energy consumption. 360 degree beam angle. corner. Faster on/off response time. Color: white shell. Light color: yellow. about COMPATIBILITY REPLACEMENT. If they do not light after being inserted into the outlet, insert them the opposite way. You might need 50W 6 Ohm or 8 Ohm load resistors to keep the LED bulbs from flickering. not included. The measurement allowed error is +/- 1-3cm.