Keep your DynaTrap outdoor insect trap operating at peak capacity with the DynaTrap 43050 26W UV bulb. Compatible with DynaTrap models DT1750 & DT1775, this replacement mosquito UV light bulb attracts flying insects with warm ultraviolet light. For best results, replace the bulb in your insect trap after 3, 000 hours, or approximately four months, of use. Even though the bulb’s light may still be visible, its ability to attract insects diminishes over time. This package includes one 26W UV light bulb. The bulb measures 6 by 1.75 By 1.75".