The OSRAM LEDriving PREMIUM P21/5W is a superior LED replacement lamp for standard P21/5W lamp bases. These lamps offer a cool white light and are long-lasting, producing up to 80% less energy than standard lamps, making them a premium automotive lighting choice. They are designed for interior retrofit use and are not road legal for exterior applications. Please note that installing these bulbs may trigger a warning light on vehicles manufactured after 2005 due to technical differences between LED and Halogen technology. For compatibility, an OSRAM LEDriving Canbus warning canceller for LED lamps is recommended. Features: - P21/5W - Cool White - 2.00 W - Length: 49.8 mm - Diameter: 25.7 mm - Product weight: 21.30 g - 6 year OSRAM guarantee.