This pocket sized UV LED flashlight uses focused beam technology which produces a beam 1000% brighter than traditional fluorescent black lights! Great for detecting pet urine and other stains from up to 30 feet away! There’s no reason all your techs shouldn’t have one of these inexpensive UV lights. Can be used during the daylight, but dim lights for best results. Runs for 60 hours on 3 C cell batteries (included) and the bulb is rated at 100,000 hours!