Use this longwave ultraviolet "black light" flashlight to test minerals for fluorescence and investigate fluorescence around your house. This lamp produces UV light at 4 watts and 365-370nm to fluoresce longwave minerals. The black light has a 6"-long bulb on the side and a mini flashlight on one end. You provide 4 AA batteries. (Case color may vary.)
Note: UV light is the part of sun light that causes sunburns. Never look directly at UV bulbs. Wear UV filtering goggles or glasses if using this low-level ultraviolet light source for extended periods.
Quick Science Investigation: Are you wondering if your safety goggles, sunglasses, or regular glasses will help protect your eyes against low-level ultraviolet light like our battery-operated UV lights? Many of these types of glasses have lenses made out of polycarbonate, a natural low-level UV light filter. Test your goggles or glasses by first shining a UV (shortwave or longwave) light on a mineral or other object that fluoresces brightly. Then put the UV lamp inside the goggles or glasses and shine it on the same fluorescing object through the lens. What happens? The object will no longer fluoresce where the UV light has been filtered by polycarbonate lenses!
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