When the candle (in a jar...free standing candle will melt and make a large mess) is lit, it heats up the steel bolt/nut/washer in the middle which in turns heats up the ceramic planters. Here is Heatstick.com
explanation of the heater:
The intense heat of the Steel Inner Core is transferred into the Three Ceramic Modulators, one into the other. The High Inner Temperatures are gradually reduced by the Increasingly Thicker Walls and Larger Surface Area of the modulators. The outer surface of the radiator becomes a Dry Heat Radiating Body with surface temperatures of 160-180 degrees Fahrenheit and a surface area of Over 88 Square Inches. The Heat from a Candle is effectively Transferred into your Home or Office! Amazing! . . And it WORKS! If you burn candles, now you can effectively Add Their Thermal Energy To Your Home or Office as Dry Radiant Space Heat!
You can buy a Kandle Heeter for $30 off the Heatstick.com website if you would like but I think I have most of what I need to build one in the garage. I'll be sure to let you know how it works. I think I might have some time this weekend.
If everything goes well, I think I will make a few for around the house and might even build one with the light bulb. I'm thinking a few of these would keep the VW warm through the night.
What do you think? Do you think you will try and make one? If you do, let me know how you like it.