I'm thinking of getting an alcohol lamp so I looked into fuel sources. From what I found out, denatured alcohol is the best fuel since it's almost pure alcohol and doesn't smoke. Only drawback is it's kind of expensive. I think I paid about $9 for a quart can last year. Of course, that will probably last forever. 90% rubbing alcohol smokes a little more but is usually cheaper if you can find it. However, it's kind of hard to find. Most drugstores carry 70% and that has too much water.