Hi Stemage,
in my bumpers are #44 bulbs and it looks like they are factory sealed. I can't open your link at this moment so I can't see, what your pictures show.
So just look under the bumper caps, if there are bulbs and if they were out of order...
Be careful removing the bumper caps, they aren't screwed so you have to pull them up with a lot of attention, so the plastic pins won't break...
You can replace the bulbs although with #47 bulbs to need less energy. In my Laser War i use a red, blue and green bulb so the bumpers light more effectful.
Greetings from germany,
Dirk