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- Lumen_maintenance abstract "In LED lighting, lumen maintenance is the luminous flux output remaining (expressed as a percentage of the initial output) at any selected elapsed operating time. Lumen maintenance is the converse of lumen method lumen depreciation.Lumen maintenance compares the amount of light produced from a light source or from a luminaire when it is brand new to the amount of light output at a specific time in the future. For instance, if a luminaire produced 1,000 lumens of light when it was brand new and now produces 700 lumens of light after 30,000 hours, then it would have lumen maintenance of 70% at 30,000 hours. Useful lifetime estimates for LED lighting products are typically given in terms of the expected operating hours until light output has diminished to 70% of initial levels (denoted L70 life).There are a number of methods for controlling lumen maintenance areas: Installing photoreceptors tied directly to ballasts, controlling the voltage output to the lamps based on the set level of luminance. Connecting dimming ballasts directly to an energy management system that has been programmed for the expected depreciation of the lamps; the energy management system directs the output of ballasts as necessary to maintain required lighting levels over time. Manually verifying lighting levels in a space by using photometers in specific locations, and then manually setting the system to meet lighting requirements.↑ ↑ ↑ ↑".
- Lumen_maintenance wikiPageID "40061686".
- Lumen_maintenance wikiPageLength "2801".
- Lumen_maintenance wikiPageOutDegree "8".
- Lumen_maintenance wikiPageRevisionID "672066739".
- Lumen_maintenance wikiPageWikiLink Ballast.
- Lumen_maintenance wikiPageWikiLink Category:Lighting.
- Lumen_maintenance wikiPageWikiLink LED.
- Lumen_maintenance wikiPageWikiLink Light-emitting_diode.
- Lumen_maintenance wikiPageWikiLink Light_fixture.
- Lumen_maintenance wikiPageWikiLink Lumen_(unit).
- Lumen_maintenance wikiPageWikiLink Luminaire.
- Lumen_maintenance wikiPageWikiLink Luminous_flux.
- Lumen_maintenance wikiPageWikiLink Photodetector.
- Lumen_maintenance wikiPageWikiLink Photometer.
- Lumen_maintenance wikiPageWikiLinkText "Lumen maintenance".
- Lumen_maintenance hasPhotoCollection Lumen_maintenance.
- Lumen_maintenance wikiPageUsesTemplate Template:Orphan.
- Lumen_maintenance wikiPageUsesTemplate Template:Reflist.
- Lumen_maintenance subject Category:Lighting.
- Lumen_maintenance hypernym Output.
- Lumen_maintenance type Album.
- Lumen_maintenance comment "In LED lighting, lumen maintenance is the luminous flux output remaining (expressed as a percentage of the initial output) at any selected elapsed operating time. Lumen maintenance is the converse of lumen method lumen depreciation.Lumen maintenance compares the amount of light produced from a light source or from a luminaire when it is brand new to the amount of light output at a specific time in the future.".
- Lumen_maintenance label "Lumen maintenance".
- Lumen_maintenance sameAs m.0wf0th7.
- Lumen_maintenance sameAs Q17102779.
- Lumen_maintenance sameAs Q17102779.
- Lumen_maintenance wasDerivedFrom Lumen_maintenance?oldid=672066739.
- Lumen_maintenance isPrimaryTopicOf Lumen_maintenance.