How do the specifications of LED stadium lights compare to those of metal-halide lamps?
The following is a detailed comparison between LED stadium lights and metal-halide lamps (the most common light source in traditional stadiums), based on equivalent lighting performance:
Luminous Efficacy: LED is 130–180 lm/W; metal-halide is 65–100 lm/W.
System Power: To achieve the same illuminance, the installed power for LEDs is approximately 50%–70% of that required for metal-halide lamps. For example, for an area requiring 400,000 lumens, metal-halide lamps would need about 5,000W (assuming 80 lm/W), whereas LEDs would need only about 3,000W (assuming 133 lm/W).
Lifespan (L70): LED is 50,000–100,000 hours; metal-halide is 10,000–20,000 hours.
Annual Lamp Replacements: Zero for LED; approximately once for metal-halide (based on 4–5 hours of daily use).
Start-up Time: LED is instantaneous (<0.5 seconds); metal-halide requires 3–10 minutes of warm-up to reach full brightness and needs a cooling-down period before restarting (difficult hot restart).
Dimming Capability: LEDs allow smooth dimming down to 0% without affecting lifespan; metal-halide lamps have a limited dimming range (usually only down to 50%) and dimming significantly shortens their lifespan.
Color Rendering Index (CRI): LED can reach 90–98; metal-halide is typically 65–85 (high-CRI metal-halide lamps can reach 90 but have lower luminous efficacy).
Color Temperature Stability: LED color temperature remains essentially constant throughout its lifespan; metal-halide color temperature drifts over time (usually shifting toward green or yellow).
Flicker: LEDs can be designed to be flicker-free; metal-halide lamps exhibit 100/120Hz line-frequency flicker (visible as rolling bands when filmed by a camera).
Environmental Impact: LEDs contain no mercury; metal-halide lamps contain mercury and require special disposal procedures.
Initial Cost: LED systems cost approximately 1.5 to 2 times more than metal-halide systems. Total lifecycle cost: LEDs offer savings of 50% to 70% compared to metal-halide lamps (including electricity, maintenance, and bulb replacement costs).
Therefore, despite the higher initial investment, upgrading to LED is virtually the inevitable choice for sports venues intended for long-term operation.
