Glow-in-the-dark light bulb encased in a solid acrylic brick!The Glow Brick charges during the day so that it will glow for up to eight hours in darkness. The real light bulb inside is filled with a phosphor luminescent powder. The energy in natural UV light is absorbed into the bulb and then slowly released as it glows in the dark. Its glow will fade overnight but then the Brick recharges
More Here
No comments:
Post a Comment