Light-emitting diode - Technology - Efficiency and operational parameters

As of 2012[update], Philips had achieved the following efficacies for each color.[54] The efficiency values show the physics – light power out per electrical power in. The lumen-per-watt efficacy value includes characteristics of the human eye and is derived using the luminosity function.

Reference 1: Typical efficiency coefficient and Typical efficacy (lm/W).

Reference 2: Red, Red-orange, Green, Cyan and Blue.

Source: http://en.wikipedia.org/wiki/Light-emitting_diode