Re: [APD] Welcome to the "Aquatic-Plants" mailing list (Digest mode)

["Bob Crosby" <rtcrosby at charter_net>]

200L = 52.83 U.S. gallons, the equivalent of 1.51 watts per gallon. I
believe watts per gallon is what was being referred to. So while 1.51 might
not be optimal, it is far better than "0.4". Just thought that might be
helpful before you ran out and purchased another 320 watts of lighting. :-)

Bob 


-----Original Message-----
From: aquatic-plants-bounces at actwin_com
[mailto:aquatic-plants-bounces at actwin_com] On Behalf Of Stuart Halliday
Sent: Friday, January 27, 2006 11:35 AM
To: aquatic plants digest
Subject: Re: [APD] Welcome to the "Aquatic-Plants" mailing list (Digest
mode)

I believe S. Hieber wrote this email section below:
> Wise comments, but I will eleaborate a bit more.:
> 
> "Watts per gallon" is a technique for estimating lighting levels. You 
> take the reated watts of the bulbs over an aquarium and divide by the 
> nominal volume of hte tank. The estimated watts-per-gallon that you 
> compute this way allows you to work towards a target level of lighting.
> What's the target? There are diff ones depending on goals, plants, 
> conditons, variations in equipment and gardening techniques. But these 
> rules of thumb will serve just abut everyone well.

Gosh.

I've got a 200L tank with 2x 40W bulbs so that works out at

80/200 = 0.4!

sure you don't mean 200/80? Cause that makes 2.5


BTW, what is 'reated watts'?

--
Stuart Halliday
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