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lumen per liter

To: aquatic-plants at actwin_com
Subject: lumen per liter
From: Dennis Chua <dennis_chua at excite_com>
Date: Mon, 4 Dec 2000 16:18:54 -0800 (PST)

Rod Hanks asked in apd696:

"The old formula of watts of flourescent light (2 to 4 watts per 
gallon) is breaking down, since newer bulb types have different 
watts-to-light ratios.  Is there a rule of thumb based on lumens? "

my response :

Yes there is, although not so well known in the US. In the book "The Optimum
Aquarium" by Kaspar Horst/Horst Kipper (founders of Dupla) recommended a
range of 30~50 lumen/liter depend on low or high light plant.

Hope it helps.

dc







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