Some years ago I bought the Bell & Howell Monster Zapper Insect Trap - 2800 V. This year I purchased a replacement set of UV tubes. They do not fit. Too big. The original tubes have a part number F10T5 / BL368 RoHS 11.5” tube 12” over pins. The tubes for the new ones have a part number 8T5 I have not been able to find the correct tubes for the one I have.