Double check them in some bright sunlight with a magnifying glass. In the worst case, take one to HD or Lowes and match up the base pins and if they come in more than one wattage, choose a medium wattage. Only by one, take it back to the MH and see how it compares with the bulbs that are still working. This isn't the easiest way to do it, but it will work.
Bill
Nodwell RN110 out moose hunting. 4-53 Detroit, Clark 5 spd, 40" wide tracks, 10:00x20 tires, 16,000# capacity, 22,000# weight. You know the mud is getting deep when it's coming in the doors.