I have had this thing for over a year.  It works 24/7, making happy little noises as it dispatches yard pests.  Then...one day...it's out!  I figured the bulb was shot, so ordered another.  Installed...plugged in...No Go.  Called Flowtron and spoke with Brian.  He thought it might be a bad starter bulb.  This is a little part under the cap that gets the bulb to start.  They shipped me one...FREE.  I buggered the little bulb up installing it (my fault) and emailed Brian, offering to pay for another one.  He sent me another....FREE.  I was very careful, installed it...still No Go  :(.  On a hunch, I re-installed the new bulb...and Bingo!  I am wondering if we might have had a power surge that fried both the starter and main bulbs?