GREEN Translucent Glow in the Dark Premium Bumper Case for Apple iPhone 4S, 4G and 4
Made of durable material, the iPhone 4/4S Glow-in-the-dark Bumper fits snugly around the edges of your iPhone 4 and gives it a splash of beautiful color. Be the envy of all your friends with the most personalized and stylish iPhone 4 on the block. To make your iPhone 4/4S GLOW-IN-THE-DARK BUMPER glow, first you have to "charge" it by holding it up to light for about 10 - 20  minutes.