Color LEDs used for illumination are characterized by fixed wavelength, wavelength range, and color group as well as 60 to 170 degree viewing angles. LEDS are available in surface mount packages such as SMD, CSDM, PLCC, J-lead, gull wing, exposed pad, and a wide variety of metric sizes as well as through-hole TO-252, DPak, SC-63, and radial lead configurations.