I've done something similar with an LED strip around my halo roof and have also replaced the courtesy lights with LED spots.
Both lighting systems are wired up via relays which are energised by an ignition on feed from the centre fusebox. For the spots with the ignition off the relay connects to the courtesy light circuit so they work as normal. With ignition on they switch over to a separate battery feed and can be manually switched on and off as required. The LED strip has a similar set up but with the ignition off it is isolated.
This way there is no risk of battery drain if a switch is left on. When I eventually fit my leisure battery I will power the "ignition on" side from this instead.
If you search "DPDT" there are lots of threads concerning interior lighting circuits. DPDT (double pole, double throw) is the relay of choice for such installations.
Both lighting systems are wired up via relays which are energised by an ignition on feed from the centre fusebox. For the spots with the ignition off the relay connects to the courtesy light circuit so they work as normal. With ignition on they switch over to a separate battery feed and can be manually switched on and off as required. The LED strip has a similar set up but with the ignition off it is isolated.
This way there is no risk of battery drain if a switch is left on. When I eventually fit my leisure battery I will power the "ignition on" side from this instead.
If you search "DPDT" there are lots of threads concerning interior lighting circuits. DPDT (double pole, double throw) is the relay of choice for such installations.