solar efficacy

[10.5.2.5.2]

NOTE: This definition was changed in RP-16-17 Addendum 2. Deletions have a strike-through. New text is bold.

The ratio of the solar illuminance constant to the solar irradiance constant.  The current accepted value is 94.2 lumens per watt.

The ratio of the solar illuminance to the solar irradiance.

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