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Backing up in the dark doesn’t have to be stressful. This round GloLight LED backup light shines with 326.4 lumens from 21 white diodes, giving you a strong, clean beam that helps you see what’s behind you. It’s DOT certified for backup light function in a 2-lamp system when used as a pair, so visibility isn’t just better—it’s compliant too. At 12.8 volts, it pulls only 0.425 amps, giving you bright light with minimal power draw.
Water intrusion can ruin a light fast, but this one is built to handle it. The housing and clear lens are sonically sealed into a single waterproof unit that keeps out moisture and debris. Whether you’re on wet roads or launching a trailer into the water, the sealed design protects the LEDs and circuit board from corrosion so the light keeps working like new.
If you want function and style together, the GloLight design delivers both. The brighter outer ring gives a smooth, uniform glow that looks clean and modern compared to traditional LEDs. It’s an easy way to upgrade your trailer lighting while keeping a polished look day or night.
Installation stays straightforward with this recessed-mount light. It fits a 4-1/2" diameter hole using a grommet (sold separately) and connects with an industry-standard 2-prong plug (sold separately). The round 4-1/4" diameter housing tucks in neatly for a flush look that won’t snag gear or wiring.
Forget about replacing burned-out bulbs or cracked housings. The polycarbonate lens and housing resist impact, while the LEDs last up to 50 times longer than incandescent lights—no filaments to break, no bulbs to replace. It’s backed by a lifetime warranty on the LEDs, so you can count on long-term reliability wherever you tow or haul.

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to be taking a look at the Optronics Glow Light LED Round Backup Light. This is designed for trailers and utility trucks. It is certified for the backup light function in a two lamp system. When a pair of lights is installed, your second light would be sold separately. The unit's going to feature a sonically sealed waterproof housing and lens unit, so this is submersible. The glow light series is going to feature a brighter outer ring of light, which a smooth appearance. It's going to contain 21 LEDs or 21 diodes.
It looks like we have 6 right here in the center, and the we're going to have 15 that make up that outer band. LEDs are great replacement for incandescent light. They're going to last much longer. They're going to burn brighter, and they're much more efficient. You don't have to worry about replacing bulbs and you don't have to worry about brill filaments. The unit's going to feature a poly carbonate lens and housing.
It's going to have white LEDs with a clear lens. This is designed to be a recessed mount with a mounting grommet. Your grommet is sold separately if you're in need of one. You can find them here at eTrailer.com, and it's going to accept a plug here for the back. Your plugs are sold separately as well. If you're in need of one of those, you can find those here at eTrailer.com also.
On the back it does have a three pin connection, but since this is a backup light, it only needs a ground and power connection. It only requires a two-prong plug. Optronics is going to put the three pin connector on most of their lights, even though it may only require a two-prong plug, so don't let that throw you off. As you'll see later, the two-prong plug will cover up all three connection points for a nice sealed connection. The unit is Department of Transportation compliant. It meets FMVSS108 requirements.
Taking a look at some dimensions real quick, starting with the diameter. That's going to give us a measure of 4 and one quarter of an inch. If we take a measurement of the depth, including the plug at the back, that's going to give a measurement of right around . Looks to be about 2 and three sixteenths of an inch. Just this portion right here, that's going to measure about 11 sixteenths of an inch in depth. Again, it's going to contain 21 LEDs or 21 diodes. The power draw is going to be 0.425 amps at 12.8 volts, and Optronics is going to put a life time warranty on the LEDs. We're going to go and hook it up to our external power source, that way you can see what it looks like with power running to it. Here's our two-prong plug. It goes into these ports right here. You push it down and it's going to seal up all three connection points. You can see here that the light sends out a really nice, strong, consistent signal. Again, we're going to have those center lights, and we're going to have that outer band. The multi-diode design is really going to help optimize our light output, and the unit is very bright. This is designed to be a backup light for trailers and utility trucks, and again, it is certified for the backup light function in a two lamp system when a pair of lights is installed. That's going to do it for today's look at the Optronics Glow light LED Backup Light.
Ratings & Reviews

Gwendolyn Y.
6/24/2025
It's awesome to hear that being able to back up your boat easier in the dark now, Ryan! I assume that your boat is also a Ranger boat?



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Mike L.
10/6/2018
Because this lamp is a back-up lamp, its allowable brightness is limited by DOT regulations. A utility lamp like # BUL43CB would be brighter, but would not be DOT compliant if used as a back-up lamp.
Helpful Links
Trailer-Lights/Optronics/BUL43CB.html