Instrument panel OEM bulb size designation

It sounds like the lighting has failed for those gauges. The first image shows the bulb layout on the back of the panel. The panel is removed by removing the trim panel under the dash on the drivers side, then the top cover on the steering column. Next you use a trim tool to gently pry the outer trim piece free of the clips that hold it in, then you pry the instrument panel out gently. Disconnect the electrical connector or simply tip the panel far enough to access the bulbs. I would replace all of the larger bulbs with new as they are starting to fail. Honda part number is 35505-SA5-003. They are simple twist out and in bulbs.