Hi Chat2ow,
Welcome to the Heartland Owners Forum. There's lots of helpful information here along with a great bunch of friendly folks.
A lot of people are changing out their lights to LEDs because they draw less current, create way less heat, and can last a very long time.
I don't think Heartland has a list of recommended LEDs to replace yours, so I think you'll have to rely on answers from other owners or from external websites. One resource I've seen is at
TechnoRV, a vendor someone else posted about earlier today. They have a number of LEDs available along with a
Buyer's Guide to LED Lighting that explains how to select the correct LED. You'll have to give them your email address in order to get the guide, but it's probably worth it.
Once the correct LED is identified, there are any number of places to buy them including Amazon.com, ebay,com, campingworld.com, superbrightleds.com, just to name a few.