Dynatrap Insect Trap 6 Watt Replacement Bulbs - Set of 2 For best results, replace bulbs every 3,000 hours. Approximately 4 months with 24/7 usage. Fits the DynaTrap models DT2000XL, DT2000XLP, and DT3012 Bulbs are packed 2 to a unit 6-watt capacity