Optronics ST36RS Universal Mount Combination Tail Light

The Optronics ST36RS is a passenger-side, waterproof combination tail light that delivers stop, turn and tail functions in a low-profile, replaceable-bulb assembly.

This compact lamp is engineered as a universal mount solution for trailers and vehicles with over 80" applications that require a reliable, corrosion-resistant rear signal. It pairs an acrylic lens with a molded plastic housing, a shock-resistant socket for extended bulb life, and stainless-steel mounting hardware for secure attachment. The unit is hardwired with separate ground eyelet and mounts on 2" centers, making it simple to fit most common setups.

How durable is the light in wet or rough conditions?

The ST36RS is built to withstand weather exposure and vibrations typical of road use. Its housing is molded from all-weather plastic and the lens is acrylic, while a shockproof socket reduces bulb failure from impacts. Stainless-steel hardware helps resist rust at the mounting points.

• Waterproof design suitable for exterior rear mounting
• Molded plastic housing resists moisture penetration
• Shockproof socket reduces filament stress from vibration
• Stainless-steel mounting hardware minimizes corrosion

How easy is it to install and service?

Installation is straightforward thanks to 2" center mounting holes and included stainless-steel hardware. The lamp is hardwired with leads and a separate ground eyelet for secure electrical connection. When a bulb needs replacement, the screw-on lens provides quick access without special tools.

• Mounts on standard 2" centers for common compatibility
• Hardwired with separate ground eyelet for reliable wiring
• Screw-on, replaceable lens for easy bulb changes
• Comes packaged ready for retail display

What are the physical and electrical features to expect?

The unit measures approximately 3-1/4" wide, 7-7/8" long and 2-7/8" deep, offering a low-profile appearance that won’t protrude excessively from the mounting surface. It provides combined stop, turn and tail lamp functions in one assembly and uses a replaceable bulb supported by a shockproof socket for longevity.

• Dimensions: about 3-1/4" W x 7-7/8" L x 2-7/8" D
• Combination stop/turn/tail functionality in one unit
• Acrylic lens paired with durable plastic housing
• Shockproof socket for extended bulb life and reliability

Will it fit my trailer or vehicle setup?

The ST36RS is a universal passenger-side lamp intended for installations over 80" where a standard 2" center mounting is available. Because it is a universal-fit product, confirm mounting centers and wiring layout before purchase to ensure compatibility.

• Designed as a universal mount for over 80" applications
• Mounting pattern: 2" centers—verify existing holes or bracket fit
• Hardwired leads and ground eyelet align with common trailer wiring
• Sold as a passenger-side unit—pair with a driver-side lamp for full system replacement

Who this is for: The Optronics ST36RS is suited for trailer owners, fleets, and DIY mechanics who need a dependable, weather-resistant passenger-side combination tail light that’s easy to install and maintain. It’s a good match when you want a low-profile replacement with straightforward wiring and replaceable bulbs rather than an integrated LED alternative.