For use indoors or outdoors, z-bug bulb provides bright white, ambient lighting to any space with its 600 lumen LED. The 4 nuv leds emit a 395Nm near ultraviolet glow, which mosquitoes and other flying insects find very attractive. Surrounding the nuv leds is a 1,000 - 1,200V high-voltage grid that kills the allured insects on contact. Z-bug bulb includes z-bug bulb sweeper to remove insect remains from the grid housing