Lude Generation

Hi. I dont know whether this should be in this section or electrical, as it seems relevant to both.
My d4 light has gone out on my dash (built into rev counter).
I suspect it is a bulb, and rather than swapping for one of the ones i never use I would rather get a new bulb before stripping my clocks to get at it.

I've searched this forum as well as using google for a wider search. Ive found a few people mentioning changing bulbs, but cant seem to find any details other than Honda part numbers (78181-SS0-003) on Lings.

Can anyone please tell me what these bulbs are more commonly known as so I can get one locally?

There are sooo many different Honda blubs in there with a different prat number for each. Different sizes, colours, brightnesses...

I'd just order a whole batch online & change out all the ones there, whilst you've got it in bits.