Lighting - A couple of questions

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punky

Aquarium Advice Regular
Joined
Aug 15, 2006
Messages
93
Hi, went to the LFS to check about some lighting. He had Interpret Daylight Plus 55W but only 21". My question is .. having 2 x 21" (55W) in series near each other is better than having them in parallel?
 
kind of a confusing question.

what size tank are you talking about? are you asking if 2 55w lights side by side on a 48" tank is the same as both lights only on one side of the tank??

if so, yeah, big difference. In the first scenario, you only have 55w over each half of the tank.
if you have both fixtures over one side of the tank, that 2 foot section is getting twice the lighting as scenario one.
 
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