Using the same patented technology that is embedded in all ThermaCELL products, the company says the new lantern is up to 98 percent effective at warding off mosquitoes, black flies, no-see-ums and other biting insects. The ThermaCELL Bronze Lantern operates on a single butane cartridge, which heats a repellent mat releasing allethrin, a synthetic copy of a natural insecticide found in chrysanthemum flowers, into the air creating a 15 by 15 feet comfort zone. Each repellent mat provides up to four hours of protection and each butane cartridge provides up to 12 hours of operation. The repellent option operates on a single butane cartridge and includes three mats. The light of the new ThermaCELL Lantern functions on three AAA batteries (not included) and can be used with or without the mosquito repellent.