Some people mentioned checking the GFI. Our light has three bulbs candelabra base.
Some of the confusion is that some people have a single bulb with what I think is called an Edison base. In any case if the light does not light first thing to do is to check the bulb.

Our neighbor, reasonably handy, ran to buy the sensor. Strange all three of his bulbs were
blown.

Re: LED bulbs.
I've replaced most every bulb in my house with LED bulbs. I've learned no to buy brand x bulbs. They are cheap in more than the price.

I have three CREE bulbs in our front light post they are eight years old and still fine.
That is say 365 days 9 hours a day 3285 hours x eight years=26,280. If, I recall some of the LED bulbs claim 20,000 hours

New Photo Cell
 

Put a piece of black tape over the photo cell on the post, go to wall-mart and in the electrical supply area, pick up a screw in photo cell that you take the bulb out, put that in and put the bulb back into that, Had me for 4 years and works fine.