Homebrew PCBs

>Did you use a single ballast and series connection for those tubes?
>How many starters did it need?

Each "tube" is actually a separate lamp with its own ballast and 
starter. The lamps were on sale at the time with each costing less 
than a single UV tube. Here's a shot of the box with the lamps open 
when only four were installed;

http://www.pbase.com/eldata/image/52324065