| LED high mast | Typically offers high efficacy and directs light efficiently when paired with suitable optics. Actual energy use depends on fixture output, layout, and operating hours. | Available in a range of color temperatures and color-rendering options. Many systems support dimming and controls when compatible drivers and controls are specified. | Turns on immediately and generally requires less routine lamp replacement than traditional discharge lighting. Drivers and other components still need to be considered for access and replacement. | New installations and upgrades where energy use, controllability, light quality, and reduced routine maintenance are priorities. | Photometric layout, glare and spill-light limits, pole and fixture compatibility, surge protection, thermal conditions, controls, and total cost over the service life. |
| High-pressure sodium (HPS) | Historically valued for efficient light production, but its overall suitability should be compared with modern LED systems and the required lighting levels. | Produces a yellow-orange appearance and generally has poor color rendering compared with common white-light sources. | Requires warm-up after switching on and may take time to restrike after interruption. Lamps and ballasts require periodic maintenance. | Existing installations where compatible replacement parts are available and color recognition or frequent switching is not a major requirement. | Existing ballast and fixture condition, required color recognition, switching schedule, energy costs, replacement-lamp availability, and upgrade plans. |
| Metal halide (MH) | Provides bright white light, though energy use and maintenance should be assessed against current LED alternatives for the specific application. | Usually provides better color rendering than HPS, with color characteristics varying by lamp type and age. | Needs warm-up and typically a cooling period before it can restrike after a power interruption. Lamp output and color can change over time. | Legacy sites that need white light and have existing MH equipment, particularly where an immediate full-system conversion is not planned. | Color requirements, operating hours, restart expectations, lamp and ballast condition, maintenance access, and the cost of a phased conversion. |
| Induction lighting | Can be considered for certain existing systems, but should be evaluated against current LED options for energy performance and practical availability. | Produces white light; color quality and system performance depend on the specific equipment. | Has no conventional electrode-based lamp structure, but the power supply and other system components still require maintenance. Product availability may be limited compared with LED. | Specialized retrofit situations where existing equipment, operating conditions, and available replacement components make it a practical option. | Verified photometric performance, compatible equipment, replacement-part supply, service support, energy use, and life-cycle cost. |
| Best overall choice for many new projects | LED is often the leading option when a project needs efficient, controlled lighting, but the result depends on a properly designed system. | Offers flexibility in light distribution, color appearance, and control features. | Immediate start and reduced routine lamp-replacement needs can simplify operation; component access and electrical protection remain important. | Highways, ports, industrial yards, sports areas, and other large sites when the design can meet the task-specific lighting criteria. | Confirm illuminance and uniformity targets, pole height and spacing, glare control, environmental conditions, controls, electrical infrastructure, and maintenance strategy before choosing. |