What type of lighting is commonly used for billboards?

Metal Halide lighting is commonly used for billboards due to its ability to provide bright, high-intensity illumination, which is essential for ensuring that the advertisements are visible both during the day and at night. This type of lighting also has a good color rendering ability, meaning it can display colors accurately and vividly, making the advertisements more eye-catching and effective.

Metal Halide fixtures emit a white light that enhances visibility, which is particularly important for billboards that need to stand out in various lighting conditions and attract attention from passersby. The efficiency and longevity of Metal Halide lamps also contribute to lower operational costs for billboard lighting, making them a practical choice for outdoor advertising.

Other types of lighting, such as LPS lamps, typically produce a yellowish light that is not as visually striking and can distort colors, which is less desirable for effective advertising. Spotlights can be used in some situations for focused illumination, but they may not provide the overall coverage needed for a large billboard. Mercury vapor lamps, while occasionally used, are less popular now due to inefficiencies and have a bluish light that may not render colors as accurately as Metal Halide.