The "first generation" of Herc sims at Lyneham each had a "model room" which was unusual - at the time - as they were bigger than most and horizontal not vertical, Gan , Masirah (?) and Hong Kong if memory serves.
Each lit by gi-huge banks of halogen floodlights, augmented by equally gi-huge banks of fans down the sides to cool the models down and stop them - literally - melting !!!
In the Guard Room, and controlled/monitored by the Ord Sgt, was an electrical "load meter" for the entire station usage, if it reached a certain pre-set figure then an alarm went off and said OS had to phone the sims and order them to turn off the Visuals !!! It was NOT, as rumour said, down to cost of electricity .. it was due to the fact that the wiring would not handle that load for any length of time !!!
Xmas visits by local school kids were always popular .. as the tiny model of santa + sleigh was placed on the threshold to force an "unexpected" overshoot ....
Far more fun were the visits by the wives clubs ... when a dead spider placed in a similar position would have a somewhat startling effect .. probably as said spider now appeared to be larger than the runway !!!!