Hmmmm to me the bulbs look shorter than 4' which means 2 pins on each end. 5, 6 and 8' bulbs have single pins. Didn't think they would be that long. Do the bulbs have a Brand and ordering code on them at one end on the glass? That would tell you what size you need to get as replacements.

Also check the wiring to the ballasts if you can. How long did you leave it plugged in? Did any bulbs light up? or attempt to?

DOC @ THE AMERICAN GARAGE