The Pennhurst Memorial & Preservation Alliance (PM&PA;) actually rewired some of the buildings to get back electricity. They even installed a new telephone box, until it was destroyed by vandals.
UNFORTUNATELY people still undergo Electric Shock Therapy, and Doctors still prescribe Thorazine , Haldol, and Lithium. I work in Health Care and I know that these practices still exist today because of my job and because of personal reasons. Its sad. I really don't see electric shock therapy as productive, and those medicines are poison. They do horrible things to your body and blood.
Was this the hospital? It might've been wing C in the hospital; it was condemned and sealed off because of fire code reasons. When you say it might've been a dormitory, it could've been one of the rooms where sick patients slept.
If this was in another building on the third floor, then that would explain this room being sealed off. All the buildings with third floors (not counting the attics or hte basements) had their third floors sealed off. It is unknown why they did this, although there is some speculation that it was only economical, as the heating couldn't reach the third floor.
You said there were sunflowers painted on the windows here. In that case this might've at one time been an occupational therapy room or a dayroom. The dayrooms were where the patients went during the day; they were usually hellholes. The occupational therapy rooms were where the patients could actually do something, like music or art or woodworking.
What building was this in? If this is Penn Hall, then this is where the staff lived. This might explain the more private conditions in the bathrooms. In most of the living quarters there were just communal showers with no covers.
The hospital building was built up of 6 wings, labeled A-F. Wings E&F are one story buildings that look like they don't fit in with the rest of the buildings. Wing C is currently sealed off and condemned.
Humm...not so much now lol. Something about how that door swings in ... odd.