Amber marker lights are important for safety because they help other drivers to see the vehicle in low-light conditions. They can also help to prevent accidents by making it easier for drivers to judge the size and distance of the vehicle.
The specific requirements vary from state to state, but most states require amber marker lights on vehicles that are wider than 80 inches or taller than 80 inches.
Amber marker lights can be either incandescent or LED. LED marker lights are becoming more popular because they are more energy-efficient and have a longer lifespan than incandescent marker lights.