But there are many problems with doing what you are trying to do. First extension cords are not to be used for permanate wiring.

AND THEY SHOULD NEVER BE RUN UNDER SIDING.

I will be removing my extension cord first thing in the morning. I am glad I posted!!! I think I will just get a fixture hardwired and be done with it = )

Bill is quite right; this is against code and probably unsafe. Do remove it.

But if you could get under the siding to run that extension cord, you should be able to fit proper permanent wire (type NM or UF -- 'sheathed electrical cable') under there.

So before you remove it, get that cable, staples, a couple of boxes, all ready, and remove the extension cord and insert the proper cable all in one job.

If you don't want to put in a 'fixed' light over your table, check out some of the LED battery operated lights. I saw one that clips around an umbrella pole and provides plenty of light. It's self contained and about the size of a frisbee. You could also check into a small solar panel to recharge the battery. There are 'landscape' lights that are wired to a small panel with several feet of wire between the panel and the light. One thing about LEDs, you'll mever have to change the bulb.