A wax lamp

Another one seen at 100%design.

To raise awareness of energy efficiency, designer Tom Goodfellow has created the Wax Pendent Light with a few quid's worth of wax. It is suspended from the ceiling via a standard light fitting, and can only be used with a 20w energy-saving lightbulb (as opposed to the usual 100w bulb) - or it will melt.

Tom's work is featured at ideas factory.