Radiant flux ratios for the blue, the yellow and the total radiant fluxes of LED packages with a hemispherical globe-top. Left side (a-b): Diffuse reflectivity, right side (c-d): specular reflectivity. Top: radius 1 mm, bottom: radius 3 mm. The values are given with respect to a diffuse reflectivity of the substrate surface of 85% and with different phosphor concentrations for a radius of 1 mm (top) and 3 mm (bottom) which both result in a CIE x value of about 0.3300. + refers to the blue radiant flux, Ο to the yellow radiant flux and × to the total radiant flux.