21100R, Truck-Lite LED Red Side Marker

• 21100R
• LED Red Side Marker
• Performs both side turn and clearance marker light functions
• Energy-efficient LEDs draw less power than incandescent lamps
• Filament-free construction makes it more resistant to shock and vibration
• Sonically-sealed to protect internal components from moisture and corrosion 
• Made in the USA

Truck-Lite LED side turn and clearance marker light kits combine two essential lighting functions into one compact unit. Each kit includes one (1) lamp and mounting bracket.

Cross#: TRU-21100R

LED Yellow Side Marker: 21100Y 

LED Marker/Clearance Lamps

What lights do I need?

Check the specific vehicle requirements or contact Truck-Lite Technical Support. Note that states cannot require anything different than what is in FMVSS-108; however, states can add regulations. Contact Truck-Lite for special situations.

How hard should I tighten down (torque) plastic lights or devices?

Over-torqueing will generally cause cracking or distortion. Use the torque specifications provided by the manufacturer. A marker light will generally be in the neighborhood of 8 to 20 inch lbs., but a good rule of thumb is to use the minimum torque necessary to secure the device.

I'm painting my vehicle, what if I get some paint on the lens?

You should be careful to avoid getting paint on the lights; most paints (excluding water based) are incompatible with polycarbonate lights. They may also cause wires or cable insulation to crack.

What is the lifespan of LED lighting?

As you may know, LED lights are monochromatic. Monochromatic means that red LEDs only produce red light, amber LEDs only produce amber light... but now there are white LEDs. White light is often produced by using a blue LED covered by a ceramic phosphor coating. When the blue wave length light is produced, the phosphor releases photons that fill the spectrum and produces white light. Sometimes we use white LEDs with colored lenses to get red or amber lights but this is not common.

To answer the question, you needed to know the above information. The color of the light often indicates the lifespan of the LED Lighting. Red LEDs are known to be the longest lasting products, followed by white LEDs, with amber LED technology deteriorating more quickly. The good news is that LED lighting frequently exceed 50,000 hours of life.

Can I still drive a vehicle with LED lights if some of the LED's go out?

This is open to interpretation. It is generally assumed that, if several diodes fail on a light, but most of the light remains lit, you are okay to drive the vehicle. Truck-Lite strongly recommends replacing lights with failed diodes as soon as possible.