What is it?

I love finding new things around my house that I think would look cool when shot with my macro lens.  Do you know what this is?

 

Canon 40D

ISO 200

f/16 @ 1/125 sec

Glass - Light Field

In my macro class this week, we had to shoot glass.  I chose to go with a lightbulb that doesn't work anymore.  Here is what I came up with.

Canon 40D
ISO 200
f/11 @ 1/4 sec