I saw this one years ago so it didn't take me long to figure it out. If you haven't seen it, don't cheat, you'll really like trying to figure it out on your own.
And if you need a hint... don't read it yet... no really don't....
consider the properties of an incandescent bulb.
answer here
via DRB
Wednesday, July 01, 2015
Puzzle Me This
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