Battery for the interior lights for at night

My trailer has a spot for a marine battery it just runs the lights not the outlets would it be advantageous to have a battery instead of using a generator all night long when you need your lights? Thanks for anyone's response will appreciate it!

The battery runs only the 12volt lights. You have to be plugged in to shore power for the outlets to work.

As mentioned you need a battery for trailering.

AND, big AND you need a battery for all your detectors to work. Baring the smoke detector the other 2 detectors are hard wired to the 12 volt side and NEED that to work for your safety.

Don't know the year of your TT but most RV fridges and ac need 12 volt power also for the thermostats to be able to come on and off.

For the lighting issue all the camping big box stores have a plethora of battery operated lanterns that put out great light andlast for ever with the new bulbs they use. 2 of them will light up my entire 31ft MH.

I use them instead of running the gen. And a battery Jumpit with an inverter to run the TV.