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The red GloLight stands out with its signature halo design that looks sharp and keeps you visible day or night. The outer ring glows as a tail light, while the center brightens for braking and flashes for turning. With 21 LEDs behind a red lens, it gives off a crisp, even light that’s easy to see from any angle. It draws just 0.145 amps for the tail light and 0.375 amps for the stop/turn function at 12.8 volts, so it’s energy-efficient while delivering serious brightness.
If your trailer ever meets wet roads or boat ramps, this light is built to handle it. The polycarbonate housing and tinted acrylic lens are completely sealed, keeping water out and protecting the LEDs inside. That means no fogging, no shorting, and no corrosion—just reliable lighting even after repeated submersion.
Mounting is simple thanks to the built-in flange that sits flush once you cut a 4-1/2" hole in your trailer. The surface-mount design gives a clean factory look without extra brackets or adapters. Wiring is just as straightforward—the standard PL-3 connector works with common 3-prong plugs like the A45PB or A47PB (sold separately), so hook-up takes minutes.

This light is made for years of use without the hassle of replacing bulbs. LEDs are more efficient and durable than incandescent lights, and Optronics backs them with a lifetime warranty. At 5-1/2" in diameter and only 1-1/2" thick, it’s a snug, low-profile fit that does its job quietly but makes sure you’re seen clearly every time you hit the road or ramp.

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today were looking at part number STL101RFB from Optronics. This is a 4 round glow light, LED stop turn taillight with a flange mount. You have a perimeter band of red LEDs and that will be your tail light. In the center you have a grouping of LEDS that will be your brake light turn signal. This light has a red polycarbonate lense over all the LEDs that is sonically sealed and waterproof. The light uses surface mount technology which protects the LEDS from moisture, shock, vibration, and bumps, and it allows for thinner construction.
On the back you need a 3 prong standard plug. If you do not already have one, then you will need to purchase this part which is sold separately. This is the Optronics Right Angle 3 Wire Pigtail plug. Its Part Number A47PB. Were going to put that in the light.
Now its in there nice and tight. There you go. If you need it, theres also a mounting bracket available. This is the Optronics Mounting Bracket for 4 round taillights. Its sold separately as Part Number BK45BB. It fits right on the built-in flange mount like that.
That looks nice. We do have a portable power source here today, so I can show you how this light shines. The first wire Im going to connect to the power source is the ground wire. Thats the white wire with a ring terminal. As you know, ground wires should always be installed on a clean, unpainted, metal surface.
The red wire from the 3 wire pigtail is your brake light and turn signal. And finally the black light on the pigtail is your tail light. Now that weve got these hooked up to our portable power source, we can turn off our overhead light. I will turn on the power, and you can see your tail light. This will get a little brighter when you depress the brake pedal and that will look like this. Theres your brakes, and heres your turn signal. We can turn our lights back on. This light has a 4 diameter. Thats the light inside the flange. It is 1 1/4 thick. Theres a lifetime warranty on the LEDs and a 3 year warranty on the housing and wiring. There you have it for Part Number STL101RFB the Optronics 4 Round Glow Light LED Stop, Turn, and Tail light. .
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98% were satisfied with this product
2% of customers were not satisfied
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Brooke M.
8/30/2023
That really bites, to say the least! No one wants brand new, scratched lights. I will send your information to our customer service team and they will be reaching out to you.