921-24-5050-WW Warm White 5050 SMD Light Bulb with Wedge Base

The year is 2024... if your RV is still using incandescent bulbs, you really should upgrade to these. Uses a fraction of the power of a single 921 light bulb. This allows your RV to run lights for much longer, and with much less heat produced. In fact, I don't even bother worrying about leaving 10 of these LED bulbs on simultaneously for extended periods of time--they'll use less than what a single incandescent would use. Will purchase more of these in the future.

Would recommend

Excellent! I bought 3 bulbs and plugged one each into a double bulb fixture in my RV. Huge difference in brightness! I was so pleased, I ordered 3 more. I will do the same...using one bulb in each of the 2 bulb fixtures. Color temperature was perfect as well...natural lighting is what I like. Shipping was fast and packaging was perfect. No issues with product or purchase. M4 is my new supplier! Thanks guys and gals at M4!

The bulb base is thicker than the original bulb. But with a little mussel power it if the socket. 50% better lighting for my stove over hood vent. M4 Note: Some original glass bulbs are thicker than others, so the LED will be towards the thick side to prevent it from being loose in some connections. You should not have to force anything, here is the technique: hold the LED with your thumb and middle finger, pointer finger on top. Line up the wedge base to the socket. Push firmly with your pointer finger, but when you do rock the LED back and forth along the length of the wedge (not against it). This will open the clips in the socket and it will pop right in. 100% success rate. You can also use a little di-electric grease to lubricate the socket and protect the connection.

I really would like to give these 5 stars as the apparent quality warrants it. My only reason for knocking off 1 star is I was hoping the warm white would have been less bright than they are. I originally had plans to order additional natural white bulbs but am using these in those locations as well. On that note, perhaps M4 can come up with a bulb of similar quality with a lower lumen output. M4 Note: Most RVer are looking for more light, so we cater that way. But look at our 1156-9-3030-WW, it will probably do exactly what you are requesting.

Works Fine, Fits tight. Right lums 4 me. But expensive.

I replaced the incandescent/tungsten bulbs in my camper with these bulbs from M4LED. At first I bought from another website and the bulbs were awful. They were dim and a horrible color, sort of greenish white. The bulbs from M4LED were much brighter and the color accuracy was much better though still not perfect. This is why I only gave them 4 stars. It would be nice if there was a CRI rating listed. The power draw from these bulbs is significantly less than the old incandescent/tungsten bulbs. Very happy about that!

I've been to some local RV camper parts stores and online but I'm glad I found you guys!

Haven’t used product yet except for test. Worked well. Past good experience w M4 prompted me to reorder. Great delivery time.