TI is developing LED driver solutions for each of the applications shown here. In these applications, the input voltage is the AC mains voltage with some isolated and non-isolated requirements. Each of these applications they have their own unique challenges. Residential and light commercial applications, such as the light bulb and down lighting, are very space constrained, have very difficult thermal management challenges, and are very cost sensitive. This market is currently dominated by incandescent, halogen, and CFL type lighting sources. In the outdoor and industrial markets, TI has focused on street or roadway lighting where the power range if using LEDs is from 20 to 75W. The main driving force behind the adoption of LED based lighting systems in this market is the increased reliability. LED based lighting systems have life expectancies upwards to 50 thousand hours or more. The longer life significantly reduces costly maintenance recurrences which can save cities and municipalities significant budgetary expense. TI is also addressing the electronic driver solutions for large infrastructure lighting applications which are in the 65W to 500W range. This includes high bay, stadium, airport, and night construction type lighting systems. One of the main differentiators for LED lighting is its inherent simplicity to dim for energy conservation. This enables use of smart light sources that react to changing environmental conditions. Another growing requirement for lighting is power factor correction where requirements may go down to power levels below 25W. Other applications addressed are ornamental, pathway contour, architectural, and letter lighting.