What is this antique light used for?

I am an interior designer who has a client who can’t identify the use of antique lamp she owns. It is old and a combination of iron and glass and is electric. It is about 36 inches tall. All this is in one peice. It has a 12″x12″ platform on the top of emerald green glass which is uplighted from a torchere type lamp underneath. I would say it was a plant stand or display table of some kind. Her 83 year old mother insists that it is a piano light. This client has a very extensive and valuable antique collection of furnishings, accessories, paintings, fabulous vintage clothing, silver, linen, cars, etc. that was inheirited from her family members. So it is no telling what this thing is. Please help me!!!

have you taken a picture? take it down to an antique store.. if they do not know what it is, they should know how to find out..

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