Instrument lights dim

The gauge lights (Speedometer, tachometer, temperature) on my daughter's vehicle listed above are very dim. It's very difficult to see how fast you're going at night even with the adjustment wheel turned all the way up to the brightest setting.
I found instructions on how to pull the instrument cluster to replace the bulbs but I can't locate info on what size bulb and how many I need. Anyone know the answer to this?

The lights for warning indicators seem to be fine.