who knows VHO ballasts?

[4ptbuck]

I have a Magentek 931-lh-tc-p ballast.
It says it can run two F96, F72PG, VHO, SHO, T10 T10J lamps.

Does this mean it will be able to run a 72" VHO tube?
What does PG mean?

I want to set this up with 2 URI 10k Aquasuns for my 6 foot 150 gallon tank.

Can any body help confirm I can run a F72 VHO tube.

thanks
4pts...