Japanese Vase/oil lamp/Electric

So I have had this old lamp in storage for years and forgot about it. I inherited it and would like some information if any one has ideas of where it came from. What I believe it to be it to be is a Japanese Vase Meiji Period transformed into an oil Lamp then probably around the 1920 turned into an electric lamp. Believe it to be a Bronze with the Elephant ears being perhaps Brass. Look forward to some input. Should I convert this back to an oil lamp? The tank is still inside.