Ключевые слова: background, bills, button, clean, color, conservation, consumption, control, copy, costs, design, domestic, economy, electric, electrical, electrician, electricity, energy, environment, equipment, expenses, facilities, home, hotel, house, household, illumination, indoors, interior, light, modern, object, off, office, on, plastic, power, resource, room, safety, saving, space, switch, technology, text, turning, utility, voltage, wall, white,