The citronella and cedar formula of TIKI(R) Brand Ready 2 Light(R) BiteFighter(R) Torch Fuel provides proven mosquito repellency (see statement below). The convenient pre-filled canister fits most TIKI(R) Brand torches and last up to 5 hours. Simply remove the cap, ensure 3/4 inch of wick show at the top, place the canister in the torch, light and enjoy a fun backyard or patio experience with relaxing natural flame ambiance. When the canister in empty, dispose of and replace with a new TIKI(R) Brand Ready 2 Light(R) canister. TIKI(R) Brand Ready 2 Light(R) canisters are not refillable. Based on studies using CO2-emitting mosquito traps which demonstrated over 50% reduction in captured mosquitoes compared to untreated controls. Use as directed. Efficacy may be affected by weather conditions, torch placement and individual physical factors.