light output ratio (of a luminaire) [RLO]

ratio of the total luminous flux of the luminaire, measured under specified practical conditions with its own lamp(s) and equipment, to the sum of the individual luminous fluxes of the same lamp(s) when operated outside the luminaire with the same equipment, under specified conditions

Unit: 1

Equivalent term used in the US: "luminaire efficiency"

See also NOTE to "optical light output ratio"

Abbreviation: "LOR"

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