ThermaCELL’s outdoor bug repellent lantern creates a 4.5-m x 4.5-m (15-ft x 15-ft) area that keeps bugs out and allows you to enjoy the great outdoors carefree. Featuring eight LEDs, the lantern offers twice as much light as earlier ThermaCELL models and weighs less than a pound. Each lantern comes with one butane cartridge and three repellent mats. Tested by the U.S. Army, ThermaCELL repels up to 98 per cent of mosquitoes and has been evaluated by the Environmental Protection Agency (EPA) for safety and effectiveness. The repellent—allethrin—is a synthetic copy of a natural insecticide, pyrethrin, found in the pyrethum flower, a member of the chrysanthemum family.