I found the most lovely candle sconces at Hobby Lobby for our living room wall. Problem is, they came with those obnoxious candle spikes right on each level. Why obnoxious? Well, when we put open candles on there one night, we discovered the iron "cups" weren't even close to large enough to accommodate the melted wax, and we had quite a mess to clean up.
So, I thought "aha! I'll go out and buy some clay and level it off to above the level of the spikes. Then I can just buy some votive glasses to catch all the wax" I did so...and then we discovered the candles get hot enough to melt the clay under them like wax. No go.
So I made little cardboard circles to go under the candle cups (bought from the dollar store) to level them off to above the level of those stupid spikes. Knock on wood, thus far it seems to be working, and the candles are high enough on the wall that only a really tall person with a keen eye for detail would notice them.