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Lumen watt conversion

Sun Feb 01, 2009 7:10 pm

Is there a correlation between the watt, (power) and the lumen,(illumination)? It's confusing to try to determinewhich flashlightoffers more light when they're listed in watts and or lumens. :?

Re: Lumen watt conversion

Tue Jul 13, 2010 2:43 am

Every source of light has different ratio lumen/watts (sometimes quoted by manufacturer in their specifications). For incandescent lamp it is approx. 12-14, for halogen could be over 30 but a broad range , for luminescent over 50 for LCD even higher, therefore the Q ?is to define well the source and research about the ratio.

Re: Lumen watt conversion

Fri Sep 12, 2014 2:51 pm

sluncho wrote:Every source of light has different ratio lumen/watts (sometimes quoted by manufacturer in their specifications). For incandescent lamp it is approx. 12-14, for halogen could be over 30 but a broad range , for luminescent over 50 for LCD even higher, therefore the Q ?is to define well the source and research about the ratio.


I couldn't understand what you mean but do you know if I have a 100 lumens lamp how can I know how much watts are in this 100 lumens lamp