My studio is currently situated at the back of a large old building. Part of the building is derelict and unused so I have decided to take the opportunity to use some of this space for a modelling shoot, as the setting looks perfect for the type of look i want. My problem is the room i want to use is another story higher than any power source and i am wondering if there are any ideas for using a portable power source and what kind? I would use an extension but I would need about three really long ones. Any ideas are much appreciated. Thanks