Idea outlined flat icons - Stock vector

idea, creation, creativeness, thought, imagination, innovation, intelligence, invention, success, solution, challenge, goal, achievement, concept, lighting, bulb, lightbulb, lumen, power, energy, electronic, electrical, icons, set, flat, buttons, application, round, circle, frames, outlines, strokes, design, template, user-interface, elements, vector, illustration, symbol, plain, simple, white, green, red, yellow, blue, brown, magenta, mustard, gray