Stop replacing burned-out 921 incandescent bulbs every season. The AP Products 921 LED Tower drops straight into any standard T10/921 wedge-base socket and delivers brighter, whiter light at a fraction of the current draw. Whether you are upgrading dome lights, reading lights, map lights, or cargo area fixtures, this is the no-hassle swap your rig needs.
The 921 bulb is one of the most widely used wedge-base bulbs in the RV industry. You will find it throughout Class A, Class B, and Class C motorhomes as well as fifth wheels and travel trailers -- in ceiling dome fixtures, bunk lights, step lights, slide-out courtesy lights, and storage compartment lights. AP Products' tower-style LED version slots directly into those same sockets with zero wiring changes.
The "tower" design stacks multiple LED chips vertically on a compact PCB, projecting light in multiple directions rather than just forward, which helps fill a dome lens evenly and reduces the hot-spot effect common with single-direction LEDs.
Standard T10/921 wedge base slides into any factory 921 socket -- no adapter, no rewiring needed.
LED technology draws significantly less amperage than the OEM 921 incandescent, easing the load on your 12V house battery system.
Vertically stacked LED chips spread light across a wider angle for more even illumination inside dome and reading fixtures.
LED construction far outlasts incandescent filament bulbs, reducing how often you need to carry spares or crawl into overhead fixtures.
The 921/T10 wedge base is a near-universal standard across recreational vehicles built in the last 30 years. Common locations include:
This bulb fits any fixture that accepts a standard 921 or T10 wedge-base bulb. It is compatible with 12V DC lighting circuits as found in virtually all RV interior lighting systems. Check your existing bulb for the number "921" or "T10" printed on the base or glass -- if it matches, this LED tower is a direct replacement.
Common RV brands and manufacturers that use 921-base bulbs extensively include Forest River, Coachmen, Keystone, Winnebago, Thor, Jayco, Fleetwood, and Gulf Stream, among others. AP Products is a long-standing OEM and aftermarket supplier to many of these same manufacturers, so you are getting a part built to the same standards as what came in the rig originally.
AP Products (part of the Lippert Components family) supplies a broad range of RV hardware, lighting, and interior components. Their LED bulb line covers the most common RV wedge and bayonet bases -- 194, 906, 921, 1141, 1156, and others -- making it straightforward to do a whole-rig LED conversion using parts from a single trusted supplier. Part number 016-781921 is specifically the tower-style LED in the 921 base size.