It can sometimes be confusing to figure out which fuels are safe for use indoors. There's nothing like the ambiance of dining by an oil candle, but toxic fumes can really put a damper on your dinner.
The fewer additives to your fuel, the less likely it is to smoke. Pure paraffin oil is the choice for oil lamps, lanterns and smokeless candles. It's very safe for use indoors, and is smoke and soot free. If you desire a scent, you can add your own or purchase any Firefly Fuel with Citronella Oil or Eucalyptus Oil.
Here's a great article on the US Government website discussing the use of essential oils.
There are occasions where you'll WANT smoke. Outdoor tiki torches are an excellent option for shooing away bugs, and in this case, smoke is your friend. Your tiki torch smoke shouldn't be repelling your guests, though - if you find your torches smoking excessively, shorten your wick, and be sure to only use high-quality torch fuel.
Not sure if your oil is safe for indoor use, or wondering how much smoke is TOO much on your outdoor torches for bugs? We can help!