Installing a sub panel solely for outdoor Christmas lights/decorations. I will need approximately 120 amps now, with more to be added later. My current main panel does not have enough open slots for this since each circuit will be limited to 20 amps because of the outlet and switch ratings. Running a sub panel off of a 100 amp double pole breaker will not give me enough amps at the sub panel. Would it be better to connect two sub panels with lower amps to each, or does any one make a double pole breaker that will allow 150 amps through it? Already looking at #2 wire run inside conduit from the main to the sub. The circuits will all be on at the same time, for a few hours every night if that matters. Main service is 200 amps. Distance from main to sub will be approximately 50 feet. Thanks. Will be converting to LED lights in the future.
It's obvious you take your lighting seriously. You would be better off applying for and setting temporary power rather than trying to upgrade you existing service. It really doesn't matter how long you lighting stays on if it runs over two hours unless you are planning not to run anything else while the lights are on. Something like this could put a lot of strain on your service.
So what I would do is set a temporary service in an unobtrusive area and have the utility company activate it and deactivate it every year.
Good luck with your project and your neighbors complaints.