Ultra-Violet Lights Practical, portable, versatile color-grading light that features both UV short wave and long wave light and comes with a chamber for color grading. The ultra violet Light Detects fluorescence in Diamonds, Rubies, Emeralds and Synthetics. Also this dark chamber can be used to identify Synthetics from lots. Also portable UV Torch Lights are available for people on the move. Very economic and convenient gadget to own.