Ключевые слова: background, brain, bright, brightness, bulb, circle, clear, clever, closeup, color, colour, concept, conservation, creative, creativity, design, discover, discovery, electric, electrical, electricity, energy, eureka, fluorescent, glass, halogen, idea, illuminate, intelligence, intelligent, invent, invention, isolated, lamp, light, lightbulb, power, smart, socket, solution, solve, source, sphere, strategy, think, tungsten,