I purchased this model to replace a much earlier model that I have used for about 15 years. The old zapper finally burned up the transformer and I ordered and put this new model into operation. This unit has 2 40 watt tube style bulbs and has even better coverage than the old unit and has much more insect stopping electric power. I am very pleased with this machine and would recommend this unit to anyone needing a good ,powerful, insect killer. If this unit lasts as long as the first unit, it will be well worth the money and is a fair priced unit. I have no complaints about this unit. If you need a bug zapper, try this unit.