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Talk:Candlepower

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This is an old revision of this page, as edited by 193.187.211.118 (talk) at 14:49, 5 November 2008 (→‎Calibration of lamps). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Calibration of lamps

I doubt that there is a direct relation between the cp value and lm value of a light source? Because there is no direct relation between the cd and lm. And the cp value is a factor of the cd value. But using cd (or cp) for the description of a source is not adequate. The cd that light source emits depend on the angle of the measure. If you measure perpendicular to the filament, then the value will be higher than measured from the side. So my question is: what use does the cp value have? I know it's an obsolete unit. But it is still used: http://www.pmlights.com/bulbs.cfm --TeakHoken193.187.211.118 (talk) 12:03, 5 November 2008 (UTC)[reply]

I found the answer: http://www.donsbulbs.com/cgi-bin/r/d.pl/cp.html ; http://www.donsbulbs.com/cgi-bin/r/d.pl/mean_spherical_candlepower.html . Seems that MSCP can be converted into lm.--TeakHoken193.187.211.118 (talk) 14:49, 5 November 2008 (UTC)[reply]

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