Excessive heat generation is one of the main reasons why LEDs fail. With the Oslon Square, Osram Opto Semiconductors presents an LED that withstands high ambient temperatures particularly well. To ensure that the colors of several LEDs in a luminaire remain uniform even at higher temperatures, they are measured and binned at 85 degrees Celsius (°C), a temperature that comes very close to that encountered in lighting applications within buildings, in everything from spotlights to retrofit light sources.