921 / T10 Base Incandescent Bulb. 2 amps, 255°F Degrees.Your existing 921 bulb is 265-300 Lumens. This bulb is 540 Lumens – about 100% BRIGHTER than the bulb you are replacing!
This is the bulb that SHOULD be in your fixture – brighter, cooler (no more brown fixtures and lenses) and with 90% less energy used.
This bulb is a Cabin Bright Exclusive!
This T10 bulb fits your 921 – Wedge socket.
• Base: T10, 921 – Wedge
• LEDs: 9-5730’s
• Volts: 10-30 AC/DC
• Amps: 0.125
• Lumens: 540
• Dimensions: 24mm Diameter (not including base)
• Lifespan: 60,000 hours
• Color: 3200K-Warm White 4100K-Neutral White, or 5500K-Day White
• DIMMABLE!
Colors are for comparison only. Colors will vary with different monitors and settings.
THIS DOES NOT REPRESENT BRIGHTNESS.
Choose your preferred color temperature from the “Choose an Option” drop-down menu above.
The 9-5730 LEDs produce 100% more light than your 921 incandescent bulbs you are replacing but will draw less than 7% of the power. . .Making your house batteries last longer. To REALLY make your coach batteries last the longest, look through the rest of our site and replace ALL your lights with the Cabin Bright LED Solution!
1141 / 1156 Single Contact Base
1076 Dual Contact Base
168 / 192 Wedge Base Marker Light Bulb
T10 / 921 - Wedge Base, 5-5050 LEDs, 12 volts - .09 amps, 70 Lumens, 3200K-Warm White or 5500K-Day White
Bulb pictures are not to scale. 
Phil Baker –
At first I was a little skeptical of the claims of this bulb. Boy was I surprised! This bulb is WAY brighter than the 921 bulb I replaced. After leaving it on for 8 hours straight, I was able to touch the bulb and it was only just slightly warm. I will be replacing all 40 of my puck lights with this bulb. Thank you Cabin Bright for a great product.
Carl S (verified owner) –
Lots of options on lights so I emailed Joe to see which ones would work best for me. He took the time to understand what I was looking for and recommended these as replacements in my Jayco Jayflight trailer. Before swapping them out, I turned on the two light fixtures in the living area that have 2 bulbs each. With the four bulbs on, I was drawing 5 amps off the battery. I swapped just those four bulbs and my current dropped to 1/2 amp. I replaced all 20 of the bulbs in my camper and can turn them all on and still draw only 2.5 amps which is half of what just my living area fixturuhes drew before. Based on Joe’s recommendation, I went with the warm color (3200 K) for all fixtures except under the sink and over the bed for reading. I wanted to try a few of each type just to see the difference. They do seem brighter than the old, lights during the daytime anyway. Look forward to trying them out for real on the next camping/hunting trip. I bought these 9-5730s for all of my indoor fixtures and the wedge base 24-5730 with the pigtail for my outdoor fixture. I just installed mine last week so can’t comment on longevity, but Joe said he’d back them up and I have no reason to doubt that. LEDs should last a long time. I kept the old bulbs to swap out if I ever sell the trailer. They seem to be a really nice product designed by a nice guy.
If you like to boondock and battery life matters to you, these are a big win over the standard bulbs that came in my Jayflight.
Tommy Molnar (verified owner) –
Hi Joe,
We ordered a batch of lights from you not too long ago. Somehow we managed to overlook the light above the kitchen sink in our trailer. Wifey found it and gave me hell! So that’s why the order is so small. Now every light in/on our trailer is LED. Man, what a ‘life changing experience’ these things provide. As 90% boon-dockers (with solar and an inverter), we used to use battery powered lanterns at night because the traditional lights drew so much power. Now we can sit in bright lights at night just as if we were plugged in.
Thanks again for your great products and great service. Anyone who is impressed with our lights gets directed to your website.
Tommy Molnar
Carson City, NV
Chari (verified owner) –
Needs care when installing
Diane H. (verified owner) –
Awesome service! We were having difficulty determining what type of light that we needed, Joe was awesome very big help. Really nice to talk to. We highly recommend this company.
Dan N Tankersley (verified owner) –
David (verified owner) –
I bought this to replace a burnt-out range hood light. I’ve only installed it and turned it on. We haven’t cooked under this light yet but we can say it is much brighter already.
Steven Selheim (verified owner) –
I put 8 of these in the bathroom of my 09 Phaeton which already LEDs, the difference is literally night and day. This morning I felt like I was shaving in daylight rather than a dark alley.
Sean (verified owner) –
Steven I. (verified owner) –
This light is AWESOME!! The original bulb in my trailer hood range was so dim you couldn’t even tell is was on!! This light is so much brighter, it actually lights up the entire stove top and surrounding counter!! Going to get another one for my Father-in-laws trailer!! Thank you Cabin Bright!!!
Fuzzy Overbeck (verified owner) –
Fuzzy
Corinthian (verified owner) –
The light made my Camper so much brighter, and so much nicer! I was thrilled to have a porch light again!
Andrew D. (verified owner) –
Great alternative to a bulb but a little tricky to index into holder. Looks great