Ключевые слова: background, bright, bulb, closeup, coin, compact, concept, conservation, conserve, currency, different, dollar, earth, eco, ecology, economy, efficiency, efficient, electric, electricity, energy, environment, equipment, fluorescent, friendly, glass, glow, green, idea, illumination, incandescent, industry, innovation, invention, lamp, led, light, modern, money, power, save, saver, saving, shine, solution, spent, stack, success, technology, watt,