Ключевые слова: background, bank, bulb, bulbs, business, calculator, commercial, concept, conceptual, connection, conserve, consumption, dollar, economic, economy, efficient, electric, electrical, electrician, electricity, energy, environment, environmental, equipment, finance, fluorescent, glass, green, hardware, home, illuminate, illuminated, lamp, led, light, light bulb, lightbulb, measures, money, nature, payment, pile, plant, power, save, savings, solution, stack, supply, white,