Flowtron BF-35 Replacement UV Bulb for BK-15 Outdoor Bug Zapper The Flowtron BF-35 Replacement UV Bulb is your ultimate ally in maintaining a bug-free environment especially during those outdoor gatherings. As the heart of the Flowtron BK-15 Outdoor Bug Zapper this UV bulb plays a crucial role in attracting mosquitoes and other pesky insects ensuring you and your family stay comfortable and bite-free. Easy to install this replacement bulb is designed to keep your bug zapper operating at peak efficiency safeguarding your home both day and night. Keep your space protected with the reliable Flowtron BF-35 UV Bulb always ready to come to your rescue.