I've found to be safe you'll want a hurricane wax. Go with a three watt light bulb or else you may just melt the sides in. I make them simply with a hurricane insert & 4" pillar mold. Once I've made the hurricane shell, make a separate batch of wax...whip, grubby...however you'd like the outside to look. Drizzle some over the edges, etc. Glitter, spices, you name it. Depending on what kind of cord/plate you use, I would use a teeny curling iron to actually melt away a little section of the bottom of the shell so the cord would fit well underneath the shell and exit out the back or to the side. Does that help?