Sentences with phrase «photocells on»
We sit here worrying about generating more power from nuclear and photocells on every roof but in the meantime, we just throw the stuff away.
https://www.treehugger.com/ Not exact matches
Or install a new ENERGY STAR Certified outdoor fixture that saves energy through advanced CFL technology, a motion sensor and / or a photocell that turns the light on only when someone is present or on at night and off in the morning.