Multiphysics Modeling in Discharge Lighting

Thomas D. Dreeben, OSRAM SYLVANIA, BEVERLY, MASSACHUSETTS

Modeling is being used extensively to reduce the amount of energy consumed by lighting. Worldwide, the energy consumption of lighting is approximately 2800 TWh, 20% of the global supply of electricity. At a conservative 10 cents per kWh, the cost of this energy is $280 billion per year. For the light-sources industry, gross annual income is approximately $25 billion, one order of magnitude smaller than the cost of energy used for lighting. As we pursue reduced energy consumption in all of our light-source technologies, we expect to offer global energy savings that repeatedly offsets the full cost of operating our industry.