Review on DARKBEAM UV Flashlight - 395Nm Ultraviolet LED Light For Dog/Cat Urine Detection, Anti-Counterfeiting, Resin Curing & More! by Bim Cook

One would not expect to know the things that an Ultraviolet light can do. You can use one to inspect bed sheets in hotels for 'stains' on them. It will generally light the area in a lighter color for signs of them. You can inspect for varicose veins in your feet, legs, arms, wherever as it shows them as deeper red or purple colors. Things you can not see with just normal lighting. Do not look directly at the light however! You can test your eyeglasses for how well they tint. Put the light on them and they turn dark in a matter of seconds. If you use one on your walls or ceiling, you may see where the paint has not covered the area as much as others.This light does all the above things very well. It is built rugged in a metal housing and a lens that will concentrate the light, or spread it out all over. You may find more uses for this light.