Jim.
You can get those Tea lights in packages of two for a dollar at most any dollar stores . They also have the packages of batteries for them for $1.00 as a card of 4 to 6 depending on the store.
I sell Tea lights for anywhere from $5.00 to $69.00.
The large spalted ones shown above go for $39.00
I made three like this one a few years ago with choice birdseye maple and walnut. Two sold for $69.00 each and the third one is still on our coffee table. Wife won't let me sell it .
At that time I was using the glass well oil lamps with wick which cost too much and were messy to fill and light and were probably dangerous so I quit using them.
The wax T lights or the Electric ones fit in the same hole.
It's amazing what people will pay for stuff if it nicely done and well finished.
W.Y.