Where can I find tiny individual battery powered lights?

I'm looking for small battery powered individual lights that I can use when decorating my cakes. What I need is like a dime/penny size light powered with a watch battery. I swear I've seen them used on "Ace of Cakes". I've looked on the web, but maybe I'm not using the right search... show more I'm looking for small battery powered individual lights that I can use when decorating my cakes. What I need is like a dime/penny size light powered with a watch battery. I swear I've seen them used on "Ace of Cakes". I've looked on the web, but maybe I'm not using the right search words. Does anyone know what I'm talking about or have any other suggestions?
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