8 ga from fuse box to relays...relays to switches...and switches to roof. 30 amp relays, one for each set of lights. set up to illuminate two outside/two inside lights separately.
Snapped a few pics during retrofit, will post later.
I had originally done this install with 16 ga and 14 ga wiring, but after studying a bit, and suffering a melted power line from the inline 60 amp fuse back to the fuse block mounted inside the firewall, and using 10 ga wire for the power source, this upgrade and over kill in wiring should keep things bright and "smoke free" at night. I also consulted the wiring How To section by Alikeli on thenewx.org.