Original suggestion is "nail polish + recycled lightbulbs for garden art." I think they'd make cute Christmas ornaments, and there has to be better paint and glazes than nail polish, with its tiny brushes.
DIY: glass orb cluster light/ A cheaper way-glass christmas ornaments in different sizes, just make sure that the wattage of the bulb is low(so glass doesn't break). I would spray the gold ornament tops with Krylon's, Looking Glass spray paint.
Recycled spiders from rusted wire and light bulbs for Halloween decorations. You could use the same idea to make lots of different insects - honeybees, lady bugs, a caterpillar (use multiple bulbs), etc.
Here's a bright idea - don't throw away your expired light bulbs - try making a sculpture with them instead! Free tutorial with pictures on how to make a recycled model in 3 steps by decorating with hot glue gun and light bulb.