Ключевые слова: background, black, blue, button, center, child, closeup, color, conservation, contrast, couple, difference, electric, electrical, electricity, energy, environment, environmental, equipment, finger, fingers, grey, hand, home, horizontal, house, human, indoors, isolated, light, lighting, lights, like, off, one, outlet, person, plastic, plate, power, press, pushing, rectangle, repeat, residential, save, shade, shadow, similar, supply, switch, symmetry, texture, toggle, turn, turning, twin, two, utility, wall,