Thank you!! I think they had been burning there for just under an hour, they were the 3 I made for testing, the small one had an LX20, the medium an LX22 and the big an LX24, after 2 hours they were all looking good but on the 2nd burn the LX22 and 24 started bulging out the side of the candles, the LX20 is still being burnt though and going good. Anjie,x.