A total of 3 reviews of this product on Reddit.
Ducky Cotton Candy, MX style. They are pretty thick so I’m not sure you will have any light going through them necessarily.
I got mine on Amazon ->
The price will depend on your layout. There are sets out there, it just takes some digging. aliexpress and amazon will likely have the best prices. If you’re not in a hurry you could probably find a good ebay deal on some used ones.
These are pretty popular if you don’t mind a different profile