CONTROLLED
LIGHT SHOULD BE USED ONLY WHEN IT IS USEFUL
Use controls such as timers or motion detectors to ensure light is available when it is needed, dimmed when possible, and turned off when not needed.
From IDA Value Centered Outdoor Lighting – https://www.darksky.org/our-work/lighting/lighting-principles/
Adaptive lighting controls, either at an institutional level or with home lighting is not hard to accomplish. It does take some forethought to make sure the lighting devices you choose have the capability to dim or even change CCT at scheduled times or in ‘sensed’ conditions. To ignore this ability overlooks one of the greatest strengths of modern LED outdoor lighting devices. So much energy could be saved. Ecological pressure on plants and animals in the proximity of the lights could be relieved. Just because we save a little bit on energy costs by using LEDs doesn’t mean lighting should be left on at high levels throughout the whole night. That is piggity wastefulness.
Night Lights 