Thats what I use currently. About 2 watts per gallon is sufficient for many
plants.

The red leaved plants can require more light. and do not do well 2-4 watts
is max but height of fixture above tank is also a fator. I can grow all the
easy one hbut wanted to grow more delicate plants that are more light
demanding.

I think my question should have been what is the visual appearance
differance between 55w 6700 K PC bulb and a 54 watt DAYLIGHT T5 bulb?

Beruka



"Chris_S" wrote in message
...
I've got 2-55W 6700 PC's on my 55G planted FW tank, and that is plenty of
light. With CO2 the plants grow out of the tank faster than I can prune
them. Can't imagine needing more light than that, and sometimes I think
I've got too much light. Some fish don't like so much light.

Chris.


"Beruka" wrote in message
. com...
Would four T5 6500K 54 watts bulbs place 12" over a tank be too
powerfull
for a planted tank?

I use 3 55 watts PC bulbs 3" off the surface with good effects. I doo
get
thread like algae over the third light occasionally but is very simple
to
control really.

Thanks

Beruka