OFF! Mosquito Repellent Lamp I protects you for up to 6 hours from mosquitoes that may carry the Zika, Dengue, or West Nile viruses. Keep living life your way and enjoy an outdoor occasion with friends, without worrying about pesky, biting mosquitoes. Simply by lighting the candle, the lamp releases an airborne repellent that covers an area of 10 ft x 10 ft (100 sq ft). Keep out of reach of children and pets. See the label for other precautions and usage directions.