Pyramids of Waste tells the untold story of Planned Obsolescence (the deliberate shortening of product life spans by manufacturers to guarantee consumer demand. The light bulb conspiracy is a theory that the leading manufacturers of incandescent light bulbs have conspired to keep the lifetime of their bulbs far below their real technological capabilities. This way, they ensure the continuous demand for more bulbs and hence, long-term profit for themselves.
Planned obsolescence or built-in obsolescence in industrial design is a policy of deliberately planning or designing a product with a limited useful life, so it will become obsolete or nonfunctional after a certain period. Planned obsolescence has potential benefits for a producer because to obtain continuing use of the product the consumer is under pressure to purchase again, whether from the same manufacturer (a replacement part or a newer model), or from a competitor which might also rely on planned obsolescence..