Paper is about PHILIPS \94sense and simplicity\94. Low Cost Illumination-Grade LEDs Enabled by Nitride Epitaxyon 150mm Silicon Substrates, PHILIPS The Four Elements of High-Power LED Technology, EpitaxyManufacturing Cost Reduction, Substrate Material Comparison, Pump LED Emission Wavelength Distribution, Pump Wavelength Distribution Impact:White LEDs = Blue + YAG:Ce, Project Technical Approach, PHILIPS GaN-on-Si EpitaxyTechnology, Elements of Device Development.