The Light Bulb Conspiracy investigates the history of Planned Obsolescence—the deliberate shortening of product life span to guarantee consumer demand—by charting its beginnings in the 1920s with a cartel set up expressly to limit the life span of light bulbs, right up to present-day products involving cutting edge electronics such as the iPod. The film travels to France, Germany, Spain and the US to find witnesses of a business practice which has become the basis of the modern economy, and brings back graphic pictures from Ghana where discarded electronics are piling up in huge cemeteries for electronic waste, causing intense environmental destruction and health problems.