Using same builtdata for multiple levels

Hello,

I’m wondering if there possibilities to optimize levels (same content baked) using the same builtdata (let say 120mo).

For example, I build a game with 50 levels but I cannot have so many datas (lightmaps, ect). My levels are identical but I need to create a new persistent for each one with a specific level list (only dynamic content). Assuming I’m using Lighting scenario to store everything in one level. It’s possible to use the same builtdata (120mo) for each persistent level and not 50x120mo? I’m looking for strong size optimization to fit a lot of levels in a bluray disk but it’s not looking possible to keep a good quality of lightmaps/indirect lighting with so many levels.

Thanks,
Quentin