Standard incandescent #921 replacement bulb for third brake lights (CHMSL), license plate lights, and other automotive and RV applications. T10 wedge base, 17.9W, 12V. Pack of 10.
The Camco 54768 is a 10-pack of standard incandescent #921 bulbs — the T10 wedge base bulb commonly used in automotive third brake lights (center high-mount stop lights/CHMSL), license plate lights, cargo lights, and a wide range of RV interior and exterior applications. The #921 is one of the most widely used automotive bulb types, and having a 10-pack on hand means ready replacements for multiple fixtures or vehicles without ordering again.
At 17.9 watts, the #921 is the standard incandescent version — brighter and more heat-generating than LED equivalents, with the instant full-brightness response and familiar warm light output expected from an incandescent bulb. The T10 wedge base is a direct plug-in replacement for any fixture currently using a #921, #912, #906, or compatible wedge base bulb.
• 10x Camco #921 17.9W incandescent bulbs (T10 wedge base)
The 54768 is the standard incandescent version of the #921. Camco also offers LED versions of the #921 under separate part numbers (54633, 54635). Incandescent (54768): Direct drop-in replacement, no polarity concern, works in all vehicles without compatibility issues, warmer light output, shorter lifespan LED alternatives: Lower power draw, longer lifespan (30,000–60,000 hrs), no heat buildup — but polarity-sensitive and may cause error codes or affect dependent systems (cruise control, etc.) on some vehicles
• 54768 — #921 incandescent, 17.9W, 10-pack (this item) • 54633 — #921 LED, 27 diodes, bright white, single • 54635 — #921 LED, 27 diodes, bright white, 6-pack For straightforward replacement without compatibility concerns, the incandescent 54768 is the safe choice. For lower power draw and longer life, see the LED versions.