Here is a GE PROLINE multivolt high performance electronic fluorescent ballast which can run 2 F48T12 to 2 F96T12 lamps and operate on voltages from 120-277V.
Ahh my bad. I was looking at the shape of the ballast. It looks very much like a magnetic ballast. After Aaron pointed out that this is electronic, i realized this looks pretty small. Is this a little larger than a F20T12 trigger start ballast?
Nope! same size as a 2 lamp F40T12 ballast, i do have the newer version of this that is slimmer like most electronic ballasts however it under-powers lamps compared to my Magnetek magnetic 8' slimline ballast
however magnetic slimline ballasts are longer and same height and HO is the same length just taller in height and then VHO ballasts would be even longer and just as tall as an HO ballast ..they are very heavy! VHO lamps run at 1.5A! HO is 800mA
however magnetic slimline ballasts are longer and same height and HO is the same length just taller in height and then VHO ballasts would be even longer and just as tall as an HO ballast ..they are very heavy! VHO lamps run at 1.5A! HO is 800mA