Just finished up a retrofit into my -10 of Jan Hanekom's LED landing light module (rvbits.com). All-in-one unit with nav/strobe and landing lights. Not being a builder, I was a bit nervous to try this myself but I I did it and it turned out pretty well! WAY cheaper than any of the other LED retros out there. I made a video of my effort, warts and all, if you're thinking about getting a set yourself. These lights will fit into any of the RV models.