Lümen: Revizyonlar arasındaki fark

A standard 120&nbsp;V, 100 [[watt]] [[incandescent light bulb]] emits 1500–1700 lumens, while a standard 230&nbsp;V model emits 1200–1400&nbsp;lm.<ref>{{cite web |url=http://www.bulbs.ch/index.php?cPath=49_41_55_61 |title=Standardlampen |language=German |accessdate=2008-06-01}}</ref> A 23 watt [[compact fluorescent lamp]] emits about 1500 lm.<ref>{{cite web |url=http://www.osram.dk/osram_dk/Professionelle/Brochurer_&_kataloger/Energispareprer_og_kompaktrr/e21_DULUX_EL_teknisk_guide.pdf |title=Osram Dulux EL electronic energy-saving lamps |format=pdf |work=Osram.dk |accessdate=Jan. 04, 2009}}</ref><ref name="cf">{{cite web | title=Low Mercury CFLs | url=http://www.energyfederation.org/consumer/default.php/cPath/25_44_3006 | publisher=Energy Federation Incorporated | accessdate=2008-12-23}}</ref><ref>{{cite web | title=Conventional CFLs | url=http://www.energyfederation.org/consumer/default.php/cPath/25_44_784 | publisher=Energy Federation Incorporated | accessdate=2008-12-23}}</ref> The number of lumens produced per watt of power consumed is the [[wall-plug luminous efficacy]] of the source.

 

The difference between the units lumen and [[lux]] is that the lux takes into account the area over which the luminous flux is spread. A flux of 1000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1000 lux. The same 1000 lumens, spread out over ten square metres, produces a dimmer illuminance of only 100 lux.