We report for the first time the effect of ageing due to adaptive control of lighting on the lifecycle costs of luminaire installations. Two types of LED street luminaire were aged (1) as the luminaire lit for 9 hours and then switched off for 3 hours and (2) under intensive ageing using adaptive control conditions mimicking presence of vehicles, where the luminaires were switched with 30-second interval between 100% and 20% power within the cycle of (1). The test continued for 32,000 hours. Luminaire lifetime was found to decrease by 10% due to the intensive adaptive control, which exaggerates the ageing as compared to real traffic conditions. We estimate that a realistic rate of dimming cycles would decrease the luminaire lifetime by 0–2%, increasing the lifecycle costs of a lighting installation by 0–0.7%. With a traffic-aware control system, capable of 50% energy saving in lighting, the lifecycle costs are estimated to reduce by 25% as compared to a similar LED luminaire installation without traffic-aware control, outweighing the costs due to the reduced lifetime. The smart controlling of lighting is considered as a useful way to meet future energy saving targets.

我们首次报告了由于自适应控制照明而导致的老化对照明设备生命周期成本的影响。对两种类型的LED路灯进行了老化（1），当照明灯点亮9小时，然后关闭3小时；（2）在强烈老化条件下，使用自适应控制条件模拟车辆的存在，在30秒内切换照明灯在（1）的周期内，功率在100％和20％之间的时间间隔。测试持续了32,000小时。由于加强的自适应控制，发现灯具寿命减少了10％，与实际交通状况相比，这会加剧老化。我们估计，现实的调光周期速率将使照明设备的寿命减少0–2％，从而使照明设备的生命周期成本增加0–0.7％。有了交通感知控制系统，能够在照明中节省50％的能源，与没有交通感知控制的类似LED灯具相比，生命周期成本估计将减少25％，超过了使用寿命缩短带来的成本。照明的智能控制被认为是实现未来节能目标的有用方法。