Flowing tree branches creates the impression of a light bulb. (bulb, light, lightbulb, idea, sketch, line, brainstorm, lamp, abstract, power, concept, symbol, genius, scribble, outline, innovation, business, electricity, ray, simple, technology, cute, creative, energy, invention, solution, design, science, thinking, illumination, inspiration, tree, branch, autumn, plant, seasonal, tree, leaves, leaf, decor, style, environmental, eco, nature, smart, idea, tree, natural, branch)
