Ключевые слова: background, business, cap, concept, creative, design, drawing, electricity, element, energy, equipment, eureka, filament, flat, glass, icon, idea, illumination, illustration, incandescent, insight, inspiration, intelligence, invention, isolated, light, lightbulb, multicolored, nobody, object, pencil, power, shadow, sharp, sign, solution, stationary, symbol, tip, tool, web, writing,