misc_model_static and misc_model_breakable are sent as entities. Non-dynamic lights are not considered entities. Max entity limit is 1023, keep in mind this includes players, bodyque, projectiles, lightsabers, and NPCs (which also have bodyque + projectiles + lightsabers). Also, triggers, target entities (except target_speaker), NPC spawners (but not the NPCs themselves) are treated as logical entities in some mods (Lugormod, JKG, ...?) and do not count towards the entity limit.