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 ultraviolet light detects fluorescence in Diamonds, Rubies, Emeralds, and Synthetics. Also, this dark chamber can be used to identify Synthetics from lots. This light has two tubes one for Short Wave (365nm) and the other for Long Wave (254 nm), both lights can be used individually or together for best results. Very economical and convenient gadget to own.