the energy saving streetlights made by led

avenue background beautiful black blue bright brilliant city color colorful colour conservation diode dusk economy efficiency efficient electric electrical electricity emitting energy environmental equipment evening flash gleam glittering glow green industry lamp lamppost led light lighting luminosity luminous mark night optical pole post protection provide quiet radiance ray recyclable red road save saving scattering scene semiconductor shine sign source splendor star starlight street streetlight supply traffic urban white winding