Light
fall, sun, glow, color, illumination, bright, light up, wavelength, brightness, sunlight, speed of light, lightness, physics, ignite, intensity, fire up, optics, fire, energy, rainbow, clean, clear, yellow, x-ray, vacuum, normal, white, earth, refraction, lighter, burn, sparkle, unclouded, spark, wakeful, lite, illume, lightly, alight, light, spectrum, sunlit, meteor, daylight
