Product Details: The Truck-Lite 4.31" Round 1-Incandescent Stop / Turn / Tail Signal Light is the perfect addition to any heavy duty vehicle. With its incandescent bulb technology and 12V voltage, this light is built to last. The heavy duty bulb is designed to last longer than traditional bulbs, making it a reliable choice for any truck driver. The unique shock mount design extends the lamp life, ensuring that the light will continue to function properly even in rough driving conditions. The light is available with or without a reflectorized lens, giving you the option to choose the best fit for your vehicle. The flush mount grommets are designed for easy installation in a 4.5" hole, making it a hassle-free process to add this light to your truck. The yellow color provides high visibility in low light conditions, ensuring that other drivers can see your vehicle from a distance. FleetPride is your First Click in Heavy Duty®.