Ripply light

There is something very pleasant about light reflected from a pool of water, where ripples and eddies produce swirls of brightness. However, having a pond indoors is often inconvenient.

MaxCo. has therefore developed its Ripply Light Device. It consists of a short, wide cylinder of glass, sealed at its top and bottom ends. The top surface is slightly concave. The RLD is partially filled with a viscous solution of glycerine, and is intended to be rested on top of the shade of a regular lamp.

The heat from the bulb will cause water from the glycerine solution to evaporate and condense on the concave upper surface, from where it will periodically drip back into the glycerine, producing langourously slow ripples. The light, shining upwards through the RLD, will therefore be refracted onto the ceiling in a satisfyingly ripply manner.