Lumen maintenance definition
Lumen maintenance means the ratio of maintained light output (measured after 2000 hours of operation) to initial light output (measured after 100 hours of operation). Note that in the case of replacements for 50W ELV halogen reflector lamps, light output refers only to Downward Light.
Lumen maintenance means luminous flux at a given time in the life of LED lamp divided by the initial value of the luminous flux of the lamp, which is expressed as a percentage x of the initial luminous flux;
Lumen maintenance means the luminous flux or lumen output at a given time in the life of the lamp and expressed as a percentage of the rated luminous flux or rated lumen output, respectively.
Examples of Lumen maintenance in a sentence
Lumen maintenance data shall be measured at the in-situ temperature of the LED source as described in section 4.3.
More Definitions of Lumen maintenance
Lumen maintenance means the lumen output measured at a given time in the life of the lamp and expressed as a percentage of the measured initial lumen output.