Ключевые слова: abstract, background, blue, bright, bulb, concept, conservation, darkness, economy, electric, electrical, electricity, emitting, energy, environment, environmental, equipment, generation, glass, green, hand, holding, home, idea bulb, idea concept, idea light bulb, ideas, illuminated, industry, innovation, lamp, led, lit, modern, nature, new, object, person, power, saving, technology, tungsten, white,