What does "reflectances: 80/50/20" mean on the specification sheet?

The computer photometric simulation room is set up with ceiling reflectance of 80%, wall at 50% and floor at 20%.

*Meets Life Safety Code standard minimum illuminance of 0.1FC average illuminance of 1.0FC.  Assumes open space with no obstructions, mounting height: 7.5', ceiling height: 9' and reflectances: 80/50/20.  Analysis based on independently tested photometrics.

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