This is the strongest citronella that I've tested out of 4 and I've used it for the last 2 summers to fight mosquitoes (Michigan's state bird!). The only negative are that it really is SUPER strong, so beware when you make your candles AND that on the first lighting of the candle, the whole top lights on fire. In my experience, blowing it out and relighting it does the trick and it doesn't do it again. I think it's just excess oil burning off that the wax doesn't fully absorb or something. We just make sure to always have it within our eye line, which you should do anyways, but since we only use it outdoors it's not really of much concern. I'll keep making them because they definitely work but I only make these for friends and personal use. I don't think I'd sell them due to the fact that they do catch on fire.