Ключевые слова: background, bright, bulb, conservation, conserve, eco, ecology, economic, efficiency, efficient, electric, electricity, energy, environment, environmental, environmentally, fluorescent, friendly, glass, glow, idea, illumination, innovation, invention, isolated, light, lightbulb, modern, power, reduce, save, spiral, still life, table, technology, tube, warming, watt, white, wooden,