The banker’s lamp is a style of electric desk or table lamp often characterized by a brass stand, green glass lamp shade, and pull-chain switch. … These types of lamp are frequently used in libraries throughout the United States, which have made the lamp popular through their presence in films and TV series.
Thanks.
Um.
I’m off to the bank to check out a book!
The green shade is designed for bankers/accountants etc.
You know the green visors too: https://en.m.wikipedia.org/wiki/Green_eyeshade