Ключевые слова: art, background, black, blue, brain, bright, bulb, clip, concept, conceptual, creative, design, doodle, drawing, drawn, efficient, electric, electrical, electricity, electronics, energy, energysaving, fluorescent, glass, graphic, halogen, hand, icon, idea, illumination, innovation, inspiration, invention, light, lightbulb, lowenergy, outline, power, ray, shine, simple, sketch, symbol, technology, vintage,