This weird and wonderful block of acrylic is a deliciously strange piece of lighting, as it contains a disembodied phosphorescent light bulb that seems to float within its transparent surroundings. As darkness falls, the bulb begins to glow a ghostly shade of green, gently bathing its surroundings in ethereal emerald light. Stranger still, the Glow Brick seems to be powered by phantom forces, as there's no power cord, battery box or on/off switch. But don't go jumping under the duvet in distress – this ingenious piece of mood lighting is actually solar powered. It spends the day soaking up natural light in order to gently glow by night. By day, the Glow Brick serves as an eye-catching tabletop ornament, but by night it really has to be seen to be disbelieved.