My planted 20H has 2 of these...it has 1 15 w 18" daylight tube in the front,
and 2 13 w screw ins in the rear...growth seems really good...front and
back...the 13w screw ins definately put out more light EACH than the 15w
tube....
Frank Mamone wrote:

Thought so.

Thanks Jim!

"Jim Miller" wrote in message
...
13w. aquarium lighting is assumed to be flourescent.

jtm

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"Frank Mamone" wrote in message
...
I just bought a couple of those energy saving fluorescent bulbs for my
home.
You know the ones that screw into regular incandescent sockets. They say a
13 watt bulb is equivalent to a 60W regular bulb.

A couple of questions arose in my mind.

1. Has anyone ever tried using these bulbs for aquarium lighting?

2. If one were to use one of these 13W bulbs which claim are equivalent to
60 W incandescent bulbs what value would you use to calculate the WPG?

Your comments appreciated.

-Frank