LED light decay refers to the phenomenon that LED luminaires gradually reduce their luminous efficiency and gradually weaken their light output during use.Light decay is usually expressed in two ways:
1)percentage(%): For example, the luminous flux of the LED after 1000 hours of operation drops to 90% of the initial value, indicating that the light decay is 10% ;
2)Lumen Maintenance: For example, “L70″ indicates the lifetime (hours) when the luminous flux drops to 70% of the initial value;
Low light decay means that the LED material quality is good, the heat dissipation design is excellent, and the life is longer:For example, high-quality leds may decline by only 10% at 25,000 hours, while low-quality leds may decline by more than 30% at 10,000 hours.So,the lower the light decay, the better the lumitec underwater lights is.
The LED industry standard reference:
Ordinary LED: L70 life of about 25,000~50,000 hours.
High-end LED (such as COB package) : L80 life can exceed 50,000 hours.
Key factors affecting light decay:
Temperature: Poor heat dissipation will accelerate phosphor and chip aging (junction temperature 10 ° C per liter, life may be halved).
Drive current: Overload work (such as blindly increasing current brightening) will accelerate light decay.
Materials and processes: Poor quality phosphors, adhesives or chips can cause early light decay.
LED light decay standard
1)Ordinary LED:L70/25,000~50,000 hours
2)High-end LED:L80/50,000 hours
The impact of light decay on underwater pond lights:
Brightness reduction: When the light failure is serious, the actual lighting effect of the lamp decreases, and the number of lamps needs to be replaced or increased.
Color temperature fading: Some LED light decay accompanied by color temperature changes (such as blue or yellow), affecting color rendering.
Shortened life: Too fast light decay means that the actual service life of the LED is much lower than the theoretical life (usually with the luminous flux maintenance rate L70 as the life end).
Light decay is a core indicator to measure the reliability and life of underwater light, and low light decay is a sign of high-quality LED.When choosing, pay attention to the flux maintenance curve provided by the manufacturer (such as the LM-80 test report), rather than just looking at the nominal life.Shenzhen Heguang Lighting Co.,Ltd produce good quality underwater fountain lights with the light decay 20%-30% in 2 years,click the below picture to get more of the low light decay underwater pool lights information :
Post time: May-09-2025