Optronics ST36RS Combination Tail Light Passenger Side — Waterproof, Stainless Hardware, Replaceable Bulb

The Optronics ST36RS is a waterproof, low-profile passenger-side combination stop/turn/tail light with screw-on lens, replaceable bulb and stainless steel mounting hardware.

This compact universal tail light is built for 80-inch and larger applications where a durable, corrosion-resistant signal lamp is required. It combines stop, turn and tail functions in a single housing, mounts on 2" centers, and ships with hardwired leads plus a separate grounded eyelet for secure connection. The assembly uses an acrylic lens, molded plastic housing, and a shock-resistant socket to extend bulb life, packaged for retail with mounting hardware included.

How does the ST36RS hold up in wet or salty conditions?

The ST36RS is designed to resist moisture and surface corrosion with a sealed, waterproof housing and durable materials. The acrylic lens and molded plastic body shed water, while stainless steel mounting hardware minimizes rust on exposed fasteners.

• Watertight construction for exterior mounting
• Acrylic lens resists clouding and moisture infiltration
• Stainless steel hardware reduces corrosion risk
• Molded plastic housing tolerates road spray and salt

Is installation complicated for aftermarket use?

Installation is straightforward for most hobbyists and technicians because the light mounts on standard 2" centers and comes pre-wired. The unit includes a separate ground eyelet and leads ready for hardwiring, and the replaceable bulb and screw-on lens make maintenance simple.

• Pre-wired with separate ground eyelet for reliable connection
• Mounts on 2" centers to match common cutouts
• Screw-on lens allows quick bulb swaps without disassembly
• Includes stainless steel mounting hardware for immediate installation

What are the physical dimensions and fitment considerations?

The lamp measures approximately 3-1/4" wide by 7-7/8" long and 2-7/8" deep, making it a compact unit for tight mounting locations. It is intended for passenger-side mounting and suits universal applications over 80" wide, but confirm clearance and wiring access before installation.

• Dimensions: roughly 3-1/4" W x 7-7/8" L x 2-7/8" D
• Passenger-side orientation with universal mounting pattern
• Recommended for applications wider than 80" where combination signals are needed
• Check wiring route and hole spacing to match 2" centers

How easy is maintenance and bulb replacement?

Maintenance is designed to be user-friendly: the screw-on lens exposes the bulb and socket for quick service. The shockproof socket helps reduce bulb failures from vibration, and replacement bulbs are accessible without removing the entire assembly.

• Screw-on lens for tool-free access to bulb compartment
• Shock-resistant socket helps minimize vibration-related failures
• Replaceable bulbs reduce full-unit replacement costs
• Retail packaging includes mounting fasteners for immediate use

Who is this for: The Optronics ST36RS is suited to vehicle owners, fleet operators, trailer builders, and repair shops needing a compact, weather-resistant passenger-side combination light. It fits applications where straightforward mounting, replaceable components and corrosion-resistant hardware are priorities, and is a practical choice when replacing worn or damaged stop/turn/tail lamps on wider vehicles and trailers.