low-light tanks

>Don't feel that you _have_ to add CO2 to your tank.  While this will 
>certainly give you the most options, it is _completely_ possible to have a 
>lovely, healthy, lush "low tech" set-up as long as you find the proper 
>balance and use the right plants.  While I have 2 "high-tech" planted tanks 
>that I enjoy immensely, to the casual observer, my "low-tech" tanks are just

>as pretty.  

What kind of lighting do you use on your "low-tech" tanks?