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Osram Opto Demonstrates 142 Lm/W Warm-White LED

Osram Opto Semiconductors claims to have set a new laboratory record of 142 lm/W for the efficiency of a warm-white LED light source. The LED had a correlated color temperature (CCT) of 2755 K, the LED has a color-rendering index (CRI) of 81. The peak value of 142 lm/W measured under standard conditions is achieved at a color point – with color coordinates of (x=0.46, y=0.41) on the Planckian curve - that very closely matches the perception of a classic incandescent lamp.