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Wtshymanski (talk | contribs) revert; 20000 hour lamp gives no lumen output; bulb lifetime vs. output well understood for 100 years |
Wtshymanski didn't read the SLI datasheet before making incorrect comment |
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==Comparison with incandescent lamps==
===Lifespan===
The average rated life of a CFL is between 8 and 15 times that of incandescents.<ref>[http://www.nef.org.uk/energysaving/lowenergylighting.htm The National Energy Foundation - Low Energy Lighting - How to Save with CFLs]</ref> CFLs typically have a rated [[Service life|lifespan]] of between 6,000 and 15,000 hours, whereas incandescent lamps are usually manufactured to have a lifespan of 750 hours or 1,000 hours.<ref>{{cite web | title=Osram Dulux EL Energy-Saving Lamps | publisher=Osram | format=PDF | accessdate=2007-12-24 | url=http://www.osram.com/pdf/products/general/duluxsortiment.pdf | archivedate=2006-07-22 | archiveurl=http://web.archive.org/web/20060722104807/http://www.osram.com/pdf/products/general/duluxsortiment.pdf}}</ref><ref>{{cite web | title=IEC 60969 - Self-ballasted lamps for general lighting services - Performance requirements | publisher=Collaborative Labeling and Appliance Standards Program | accessdate=2007-12-24 | url=http://www.clasponline.org/teststandard.php?no=82}}</ref> Some incandescent bulbs with long rated lifespans of 20,000 hours have [[Incandescent light bulb#Voltage, light output, and lifetime|
The lifetime of any lamp depends on many factors including operating voltage, manufacturing defects, exposure to [[voltage spike]]s, [[Shock (mechanics)|mechanical shock]], frequency of cycling on and off, lamp orientation and ambient operating temperature, among other factors. The life of a CFL is significantly shorter if it is only turned on for a few minutes at a time: In the case of a 5-minute on/off cycle the lifespan of a CFL can be up to 85% shorter, reducing its lifespan to "close to that of incandescent light bulbs".<ref name="energysavers-turn-off">{{Cite web
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