The Phoebus cartel was an oligopoly that controlled the manufacture and sale of incandescent light bulbs. They appropriated market territories and lowered the useful life of such bulbs. Corporations based in Europe and the United States founded the cartel on January 15, 1925 in Geneva. Phoebus based itself in Switzerland. The corporation named itself Phœbus S.A. Compagnie Industrielle pour le Développement de l'Éclairage (French for "Phoebus plc Industrial Company for the Development of Lighting"). They had intended the cartel to last for thirty years (1925 to 1955). The cartel ceased operations in 1939 owing to the outbreak of World War II. The cartel included manufacturers Osram, General Electric, Associated Electrical Industries, and Philips, among others. History Osram, Philips, Tungsram, Associated Electrical Industries, , Compagnie des Lampes, International General Electric, and the GE Overseas Group created and joined the Phoebus cartel, holding shares in the Swiss corporation proportional to their lamp sales. Osram founded a precursor organisation in 1921, the Internationale Glühlampen Preisvereinigung. When Philips and other manufacturers entered the American market, General Electric reacted by setting up the "International General Electric Company" in Paris. Both organisations co-ordinated the trading of patents and market penetration. Increasing international competition led to negotiations among all the major companies to control and restrict their respective activities in order not to interfere in each other's spheres. The Phoebus cartel was intended to be dissolved in 1955 but World War II greatly disrupted its operation. Purpose The cartel lowered operational costs and worked to standardize the life expectancy of light bulbs at 1,000 hours (down from 2,500 hours), and raised prices without fear of competition, in what has been described as a "classic example of planned obsolescence". The cartel tested their bulbs and fined manufacturers for bulbs that lasted more than 1,000 hours. A 1929 table listed the amount of Swiss francs paid that depended on the exceeding hours of lifetime. Some engineers deemed 1,000 hours a reasonable figure to balance the various operational aspects of an incandescent bulb, since longer lifespan means reduced efficacy (lumens per watt): a longer-life bulb of a given wattage puts out less light (and therefore proportionally more heat) than a shorter-life bulb of the same wattage. Nevertheless, long-life incandescent bulbs were and are available with lifespan ratings up to 2,500 hours, and these do in fact produce less light per watt. In 1951, Monopolies and Restrictive Practices Commission in the