Last night we had dinner by candlelight. Clementine candlelight, that is.
I saw a video yesterday over at Apartment Therapy . . . basically you score around the middle of the clementine peel, loosen and gently remove the sections, leaving the core intact. The core is the wick. Pour a little olive oil in and light the core/wick. It doesn't need to dry out or anything, just hold a match to it until it lights. Carve a little opening in the other half if you want a lid on it.
We liked it better with the lid off so we could watch it burn. It lasted for 1 ½ hours!
A lot of mileage out of one cutie!