研究目的
Investigating the effect of cyclic dimming, as used in smart lighting control, on the lifetime and failure rates of high power LED luminaires.
研究成果
The study found that cyclic dimming, as used in smart lighting control, can negatively impact the lifetimes and failure rates of high power LED luminaires. Specifically, luminaires subjected to 30-second dimming cycles showed decreased luminous flux and higher failure rates compared to undimmed luminaires. The findings suggest a need for manufacturers to specify the maximum number of switching cycles for their products and for designers to find a balance between energy savings and luminaire longevity in smart lighting systems.
研究不足
The study was limited to two types of LED luminaires and a specific dimming cycle (30 seconds). The findings may not be generalizable to all LED luminaires or different dimming strategies. Additionally, the study's duration may not fully capture the long-term effects of cyclic dimming on luminaire lifetimes.
1：Experimental Design and Method Selection:
The study involved ageing two different types of LED luminaires under cycled dimming and undimmed conditions to observe the effects on their lifetimes and failure rates.
2：Sample Selection and Data Sources:
Twenty luminaires from two different manufacturers were aged in room temperature conditions.
3：List of Experimental Equipment and Materials:
The luminaires were equipped with their own modular driving electronics, and a regulated AC power source of 230 V was used.
4：Experimental Procedures and Operational Workflow:
The luminaires were switched on for 9 hours followed by an off period of 3 hours, simulating daytime use. During the on period, half of the luminaires were cycled between 100% and 20% electrical power at 30-second intervals.
5：Data Analysis Methods:
The luminaires were measured every 5 months using an absolute integrating sphere method for luminous flux, and their electrical power consumption and spectral radiant flux distributions were also measured.
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