Ключевые слова: artificial, background, blue, bulb, city, clouds, dawn sky, dusk, electric, electrical, electricity, energy, energy efficiency, equipment, evening, exterior, glow, illuminate, illuminated, illuminating, illumination, industrial, industry, isolated, lamp, lamppost, lantern, light, metal, night, object, pole, post, power, red clouds, safety, shine, sky, source, steel, street, streetlamp, streetlight, technology, twilight, voltage, weather,