Hello,
In my game I have P_Fire and a Direc. Light but Direc. Light is Static because it is a mobile game. When I build the lightning, there is no light, only the light that comes out from Fire particle. I have disabled the Fire particle lights still no light in scene. But If I change the mobility to Stationary there is light in scene. But Stationary doesn’t works with LG G3…
Add: Spot and Point lights don’t work too.
Okay found the solution again myself 
Sorry for that but at least when someone searches the problems my way on the Google can find it
Changed the size of the LightmassImportance and make it x10 larger, worked.