WOW! I've got a 55-watt cf's on my twenty-longs and they look like the
inside of a super-nova. I can't even IMAGINE 7 watts!

kush

"You can't have everything - where would you put it?"

alex crouvier wrote in message
...
for a relatively small tank like a 20-gallon, you need
7 watt/gallon for high light plants and 3 to 4 watt/gallon
for medium light plants

"Phil Williamson" wrote in message
...
I have a 20 gallon tank with a few live plants in it now that are
growing
slowly since I only have 15watts of lighting on the tank.. How much
would
i
need to get my plants to grow at a reasonable rate? Also, is it worth
building a DIY light system or is it just best to buy a new hood and
duel
light stripe?

Phil..