Keep your DynaTrap running and the mosquitoes at by with this 26W UV replacement bulb for DynaTrap mosquito trap models DT1750 and DT1775. For maximum effectiveness, DynaTrap recommends changing the bulb(s) in your DynaTrap every 3,000 hours (roughly every 4 months). Be sure to stock up! Mosquitoes are just waiting for your DynaTrap bulb to blow, so they can feast on your blood uninhibited. Don't let them win! Make sure your DynaTrap is always glowing, attracting and killing those tiny bloodthirsty winged vampire bugs.