Ключевые слова: background, black, bright, bulb, concept, creative, drawing, ecology, efficient, electric, electrical, electricity, energy, energysaving, fluorescent, glass, glowing, gold, halogen, illumination, imagination, innovation, invention, lamp, letter, light, lightbulb, modern, notification, outline, power, saving, shine, shining, sign, simple, solution, symbol, technology, thinking,