'This is a genuine question Lucy.....why?'

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Not quite sure.  😂 

 But they are sort of interesting looking things, if you're into lighting. (my husband used to be a lighting engineer for rock/pop groups/fashion shows etc in the 80's, so lights are definitely his thing!)

Hubby has one that came out (blown) of a lighthouse about 45 years ago. It's 10 or 11 inches in diameter and perfectly spherical (except for the 'neck') with slightly 'sculptural' filaments inside......Interesting looking...'ish ? But a pain in the rear to keep dusted and sparkling!