This 13 watt energy saving bulb is designed to attract flies and pests to help maintain a hygienic environment perfect for use in the eazyzap energy saving fly killers when used with the eazyzap fly killers the bulb attracts the flies which are then killed by the fly killer helping you to keep sensitive areas such as bars kitchen and front of house spaces free of pests power 13w fits fly killers gh093 gh094 cn430 cn431