The Glow Brick from SUCK UK comes to life in the dark, as the pigment inside the light bulb emits a subtle, tranquil glow. Glow-in-the-dark pigment is trapped inside a real light bulb, which is then encased in a solid block of vivid blue acrylic resin. The mysterious optical effect is caused by light diffracting in the tiny space between the light bulb and the resin, giving its surface a polished, jewel-like effect. Also, it looks really cool. And it's easy to use.