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Re: Aquatic Plants Digest V3 #497

Hello Steve,

*Lux* measures illumination. 1 Lux = 1 Lumen per square meter
*Foot-candle* also measures illumination. 1 Foot candle = 1 Lumen per
square foot = 10.764 Lumen / sq. meter = 10.764 Lux.

*Lumen* measures flux of luminous energy. 1 Lumen = 0.07958 spherical
candle power.

Hope this helps.


George S

> I am new to the list so if this has been asked before, I apologise,
> I was under the impression that Lux and Lumens where the same thing, but
> having had a look at the Hagen web site I find that they give different
> readings of both for the same lamp.
> I can convert Lumens to Foot Candles, but does anyone known how to convert
> Lux to Lumens.
> Steve.