This is a great product that met all my expectations. The light is robust and works as expected and the price is awesome for what you get. I collect antique and vintage marbles, and purchased this product originally to check for marbles that contain uranium and manganese oxides. Under blacklight, they glow a bright green or orange. I have to admit, that after reading other reviews, we couldn't help wandering around the house at night for a look and realised just how naughty a couple of our dogs have been.