How efficient is the LED lamp?
2020年12月9日 日常How efficient is the LED lamp?
Answer: The output of the light source is light and heat. The higher the ratio of light to heat, the higher the efficiency of the lamp. Compared with standard incandescent lamps (2-3%) and fluorescent lamps (15-20%), today’s high-efficiency LED lamps have an efficiency of about 50%.
LEDs naturally have directional light, which means that the light is easier to manage and has fewer losses. Compared with all other existing light sources, this has a greater advantage in the high efficiency of the LED lamp.
What is luminous efficacy?
Answer: Luminous efficiency is the light output per unit power input. The unit is lumens per watt (lm/W). Today, the cold white light efficacy of commercially available LEDs is 130 lm/W and the warm white light efficacy is 107 lm/W (CREE XLamp MX-6). This is much higher compared to incandescent bulbs that produce 15 lm/W and fluorescent lamps that produce 60-70 lm/W.
However, the efficacy of a single LED should not be mixed with the efficacy of the lamp. Many manufacturers and distributors express the light output of LED lights as the sum of the output of individual LEDs. This is incorrect because there will always be losses due to light trapped inside the lamp. Through better design and the use of high-quality materials, the efficiency of LED lights (also known as LED light engines) can be improved.
When choosing an LED light, is the only factor I should consider lumens per watt?
Answer: No, you should also consider CRI (light quality) and your personal visual preferences. Some people prefer a warmer white light that is yellower, similar to the light emitted by an incandescent lamp. Others prefer to use the brighter, more realistic color "cool/daylight" white.
What is the service life of LED lights?
Answer: When installed correctly and well ventilated, LED lights will rarely burn. However, the brightness of the LED lamp will fade over time, so the life of the LED lamp is measured by two characteristics-how much will it fade after 1000 hours of use, and when it reaches 70% of the initial value.
High-quality LED lights have a rated light output reduction of less than 3% in the first 1,000 hours, and are rated at 30,000 to 50,000 hours for a 70% reduction in light output, which is the standard for commercial lighting applications.
Similarly, compared with traditional light sources, LED lights are superior in terms of service life.
Will frequent on/off switches shorten the life of LED bulbs?
Answer: Unlike fluorescent lamps, the lifespan of LED lamps is not affected by frequent switching.
Answer: The output of the light source is light and heat. The higher the ratio of light to heat, the higher the efficiency of the lamp. Compared with standard incandescent lamps (2-3%) and fluorescent lamps (15-20%), today’s high-efficiency LED lamps have an efficiency of about 50%.
LEDs naturally have directional light, which means that the light is easier to manage and has fewer losses. Compared with all other existing light sources, this has a greater advantage in the high efficiency of the LED lamp.
What is luminous efficacy?
Answer: Luminous efficiency is the light output per unit power input. The unit is lumens per watt (lm/W). Today, the cold white light efficacy of commercially available LEDs is 130 lm/W and the warm white light efficacy is 107 lm/W (CREE XLamp MX-6). This is much higher compared to incandescent bulbs that produce 15 lm/W and fluorescent lamps that produce 60-70 lm/W.
However, the efficacy of a single LED should not be mixed with the efficacy of the lamp. Many manufacturers and distributors express the light output of LED lights as the sum of the output of individual LEDs. This is incorrect because there will always be losses due to light trapped inside the lamp. Through better design and the use of high-quality materials, the efficiency of LED lights (also known as LED light engines) can be improved.
When choosing an LED light, is the only factor I should consider lumens per watt?
Answer: No, you should also consider CRI (light quality) and your personal visual preferences. Some people prefer a warmer white light that is yellower, similar to the light emitted by an incandescent lamp. Others prefer to use the brighter, more realistic color "cool/daylight" white.
What is the service life of LED lights?
Answer: When installed correctly and well ventilated, LED lights will rarely burn. However, the brightness of the LED lamp will fade over time, so the life of the LED lamp is measured by two characteristics-how much will it fade after 1000 hours of use, and when it reaches 70% of the initial value.
High-quality LED lights have a rated light output reduction of less than 3% in the first 1,000 hours, and are rated at 30,000 to 50,000 hours for a 70% reduction in light output, which is the standard for commercial lighting applications.
Similarly, compared with traditional light sources, LED lights are superior in terms of service life.
Will frequent on/off switches shorten the life of LED bulbs?
Answer: Unlike fluorescent lamps, the lifespan of LED lamps is not affected by frequent switching.
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