T8 info?

With all this talk on T8 bulbs (I'm a little behind in my reading) I was
hoping someone could direct me to a FAQ or supply me with some information
directly.  I ask because I hope to start a new 29 gallon tank up soon and
would like to make my own dual flourescent light hood.  The higher light
output of the T8s intrigues me.  If I have it correctly, that is.  Thanks.