5.1 High Efficacy

The efficacy of LEDs is improving rapidly (Figure 5.1.1). Latest lab data showed efficacy more than 250 lm/W. However, in real lighting fixture we have to consider several factors such as control gear performance, luminous flux depreciation with increasing junction temperature, optical losses etc., which reduce the overall system efficacy.

Various light sources efficacy increase over the time.

Figure 5.1.1: Efficacy increase over the time for various light sources.

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