Ключевые слова: artificial light, background, ball, ball shape, beams, bright, brightness, circle, circles, circular, circular shape, dark, darkness, dot, dots, feature image, illuminant, light, light beam, light design, light ray, lighting, lighting engineering, lighting technology, logo, luminary, luminosity, morphology, optics, patterns, photon, photons, point, points, radiation, round, samples, spectrum, spot, spots, structure, structures, subject, surface, symbol, symbol photo, symbols, system, texture, textures,