[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Lumens per liter

>Date: Wed, 6 Dec 2000 08:53:49 -0700 (MST)
>From: "Roger S. Miller" <rgrmill at rt66_com>

>Well, all those details are far too involved to constitue a "rule of
>thumb".  I suspect that the 30-50 lumen per liter rule is based on nominal
>lumens -- i.e. on the lumen rating of the light source.  If you need to
>base something on actual lumens then probably you're better off getting a
>meter, measuring lux and converting to lumens.

Gosh, once you have a lux meter, why go back to goofy lumens? That's sort 
of like figuring out how many gallons of gas you put in your fuel tank by 
dividing miles traveled by what your car thought it did in miles per 
gallon. Why not just read the gas pump meter? Lux is what you really want - 
the actual intensity as produced by the lumens coming form the bulb and 
bouncing off the reflector.  Hey you can even tell how bright it is at the 
bottom after all the shading and light piping takes place. Cool!

George Booth in Ft. Collins, Colorado (booth at frii_com)
"The web site for Aquatic Gardeners by Aquatic Gardeners"