This antique looking desk lamp is better known as the Bankers Lamp. Originally produced and sold under the brand name Emeralite (“emerald” and “light”). Some competitors sold it as “Greenalite”, “Verdelite” and “Amronlite”.
The Bankers Lamp has a signature emerald green glass lampshade and pull-chain switch with golden metal frame. Even though the lampshade is available in other colors, but it was the green glass lampshade that became the most popular.
One of the main reasons is that “green” is thought to be psychologically soothing, enhancing concentration and focus.
This belief was prominent in detailed-oriented occupations such as accounting, auditing, and budgeting, all of which are banking activities. So, the lamp was embraced by financial institutions in huge numbers. And eventually it became the signature desk lamp with a glowing emerald green lampshade.