One of the main advantages of metal halide lamps is their high luminous efficiency, which can reach up to 80 to 90 lumens per watt. Unlike traditional incandescent bulbs, they produce less heat when emitting light, making them a cold light source. This makes them ideal for applications where heat generation needs to be minimized. Another key feature is their excellent color rendering index (CRI), which can go as high as 90. This means that objects illuminated by these lamps appear more natural and true to life. The spectrum of metal halide lamps consists of a dense line spectrum combined with a continuous spectrum, contributing to their superior color accuracy.
In addition, metal halide lamps have a high color temperature, typically ranging from 5,000 to 6,000 K, and specialized projector lamps can even reach up to 7,000 to 20,000 K. Under similar brightness conditions, higher color temperatures make the light feel brighter to the human eye. These lamps are also compact in size while delivering high brightness, making them suitable for various lighting applications such as sports arenas, retail stores, and industrial settings.
However, despite their many benefits, metal halide lamps have a relatively short lifespan compared to other types of lighting. Due to material and manufacturing limitations, most domestic metal halide lamps last around 8,000 hours. While this may seem long, it's shorter than the lifespan of LED or fluorescent lights. Nonetheless, their high brightness, color accuracy, and efficiency continue to make them a popular choice in specific lighting environments.
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