First motor home so I’m brand new to this.
There is nothing "motorhome" about a bulb. Similar to the bulbs used in your car. You need to buy a type that has the same base (the socket the bulb plugs into) and most 12vdc bulbs are available at Walmart, auto parts stores, etc. For a greater selection of temperature "colors" and lumens (brightness), try Amazon, Ebay or a big led retailer such as superbrightleds.com/
If you want to learn more about the greater choices available with led bulbs, I've written an article explaining the terms and what they mean to the average person (no engineering prattle - just the basics!). It's on our sister RVing site at http://www.rvforum.net/miscfiles/LED...ng_for_RVs.pdf