Xmas Scene in Open World

Using some tools from the asset store I am trying to create a Holiday/Christmas Winter Scene. I have about 24 Point Lights that are Acting as Xmas Lights around the few buildings in the shot. I understand that this is not the most optimal way to pull this effect off. I've been scouring google & Unity forums for relative resources, but to no avail.

Can anyone shed some light on best practices for achieving this effect? Would it better to approach this at texture, shader, or external software level (after effects)?