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Description
Diode Dynamics 28mm SMF1 LED Bulb - Cool - White Set of 4Features Direct replacement for factory 28mm festoon bulb Adds more modern LED appearance Plug and play simple installation Overview Design. The 28mm SMF1 LED bulb is a direct replacement for any 28mm size bulb commonly found in vanity mirror lights in many vehicles. Populated with one 5050 size SMD the SMF1 upgrades the factory yellowish incandescent bulb to a more modern LED appearance. The SMF1 was designed with an embedded load resistor and
Features Direct replacement for factory 28mm festoon bulb Adds more modern LED appearance Plug and play simple installation Overview Design. The 28mm SMF1 LED bulb is a direct replacement for any 28mm-size bulb commonly found in vanity mirror lights in many vehicles. Populated with one 5050-size SMD the SMF1 upgrades the factory yellowish incandescent bulb to a more modern LED appearance. The SMF1 was designed with an embedded load resistor and implanted diode for superior reliability. With its durable metal terminals it will fit snugly in the socket and its light weight means it won't vibrate loose over time. Reliability. Unlike other bulbs on the market this bulb is built with constant-current circuitry along with transient suppression. That means this bulb will last for years not months with no flickering or failure. And like every Diode Dynamics product it's backed by an industry-leading three-year replacement warranty. Brightness. With 16 lumens of true measured output the SMF1 LED will provide similar light output to your original 28mm-sized bulb. If you are looking to increase output we'd recommend checking out our SMF2 option! All Diode Dynamics LED lighting is rated with accurate measured lumen figures not calculations or guesses. We test the true output in-house and provide you the real numbers to compare. Colors. In addition to vibrant colors of blue red amber and green the SMF1 is available in a cool white 6000K and warm white 3000K option as well. Whether you want a modern cool white appearance or a traditional warm white color we have the color to fit your need!Installation Instructions
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Best option for Sim Racing Ambient Lighting
Item Package Quantity: 2
I picked up these Light Bars from Govee specifically for my sim racing setup to be used for ambient lighting, and they’ve exceeded expectations.
The RGBIC technology is the standout feature. Being able to display multiple colors on each bar at the same time makes the lighting effects far more dynamic than standard RGB strips. During races, the lighting reacts smoothly to telemetry data—RPM, flags, rev limiter, and speed shifts all translate into immersive ambient effects that genuinely add to the experience.
Setup was straightforward, but the real highlight was the seamless SimHub integration. Configuration was quick, and the light bars responded immediately once connected. No complicated workarounds, no lag—just clean, real-time feedback. If you're already using SimHub for dashboards or bass shakers, these integrate perfectly into that ecosystem.
Brightness is more than enough for ambient lighting without being distracting, and the diffusion along the 31-inch bars keeps everything looking clean and professional—no visible LED hotspots. The WiFi connectivity has been stable, and the app gives you plenty of customization options outside of racing as well.
For anyone building a sim rig and wanting that extra layer of immersion, these are absolutely worth it.
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Reviewed in the United States on March 3, 2026
★★★★★ 4
GREAT way to view TV
On initial set up and use of just few days I love this little light bar
I'm 74 and I set this up in less than 10 min. Playing with Govee App took about same time for basic functions.
The backlighting is great and now my room is lighted during night when I sleepwalk to bathroom.
I'll decide later if I want to use adhesive pads. Currently it just sits on TV stand behind TV.
All in all it's great! I would definitely buy again and highly recommend.
Colors in photos are actually less bright in my room. The Govee App allows many many color variations. Just set up and create color palate for favorite colors and patterns. Eezee Peezee
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Reviewed in the United States on March 13, 2025
★★★★★ 5
Most Elegant Buy
Item Package Quantity: 2
Perfect, beautiful designs. Room submerges in colors. Easily installation, plug in and download app. Works perfectly -programs easy. Most compatible to the app.
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Reviewed in the United States on June 30, 2025
★★★★★ 5
Outstanding TV backlight edition
Item Package Quantity: 2, Item Package Quantity: 2
This is an excellent addition to a TV backlight. If you go into the GOVEE app you can sync this device to a TV backlight with a camera. You can add up to five lights.
I recommend this for either a TV backlight or general ambience in the room at night.
UPDATE 2025: I actually have 4 of these.
3 of them I synced with the TV strip light/camera using the GOVEE app for TV watching.
The 4th one I use is on ambience lamp.
These are made very durable/easy to set up. These things are not cheaply made
I highly recommend
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Reviewed in the United States on March 30, 2025
★★★★★ 5
Look nice and were an easy setup.
Item Package Quantity: 2
Simple and do what they are supposed to do. I use them to add a bit of flare to my desktop setup for online meetings, etc. If I had to nitpick, I'd say cabling is always interesting to route to reduce desk clutter, but I am not going to remove a star for what pretty much has to be. They look nice too.
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Reviewed in the United States on February 22, 2026
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