A method, device and system is provided for providing global illumination of a scene. The access module has dimensions comparable to a standard lavatory module and includes a ladder that may be moved from a stowed position, in which it takes up substantially no interior area of the module, to an extended position, which allows a crewmember to easily gain access to the overhead area. The system can utilize feedback pressure signals from pressure sensors at each meter to equalize positive air pressure or vacuum at the seed meters to ensure consistent row-to-row seed populations.