It seems like this situation makes it even simpler than a typical building model. You should be able to assume a constant occupancy schedule unless the building design clearly calls out that the 24/7 schedule goes down in the evening. The lighting schedules should be similar during the day, then when the sun goes down, the lights should remain at design conditions throughout the overnight hours. You might be interested in using a lighting control for your building model, as that would take the burden of choosing a lighting schedule off of you and onto the simulation model.