Made from an actual light bulb, the Glow Brick collects energy from the sun by day and lights up your night. Each one is 3.3 x 3.3 x 5-inches, large enough to keep you completely out of the dark by glowing. The effect takes place when a small space between the container’s light bulb glass and acrylic resin shrinks during production. The photoluminescent lamp is available for $29.95. We applaud the idea that we can have a night light and conserve energy without really trying.