This is a HD time-lapse video I created showing ice cubes melting and several types of Candles burning, with a large clock in the background.
Once all the candles have burnt away you can see the video played backwards extra fast.

As you can see those red scented tea light candles are rubbish, the wick burns down but leaves a great ring of untouched wax.
The twisty birthday candles at the front of the tray last only 18 minutes.

Don't ask me why I created this, its just a silly video demonstrating how time lapse photography allows you to speed up time.
I used a Canon Ixus 430 attached to a Pc running PSRemote, Taking a photograph every 10 seconds.

Warning : Dont try this at home unless you have a nice safe area to work with and you are able to keep an eye on it.
Candles can fall over, as I saw for myself before I even lit them.

There is a lo-fi version of this on my youtube channel here :
youtube.com/watch?v=fxvKCbFJqpI

Hope you enjoy this daft little video I made.