electric cabinet

[NW Mailing List]

In a photo on Ebay:

https://www.ebay.com/itm/NW-Norfolk-Western-613-4-8-4-Original-120-B-W-negative/363222162868?hash=item5491ba5db4:g:MiIAAOSwUAdf2Ugy

I noticed a cabinet in the lower left corner that has a light mounted
perpendicular to the tracks.  Would anyone happen to know the purpose of
this configuration?
Thanks,
Jim Cochran
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