This is the  best bug zappers there and I've tried plenty different ones; this unit does the best job for killing mosquitoes and also  for flying bugs. However the lights do go out after about a year and sometimes the little Transformers or igniters do as well. So, if you use it nonstop like I do  it will only last you one season, You could try to repair it but it's just easier to spend the money and buy a new one  because the cost of a new bulbs and parts outweigh the cost of a new unit . I usually buy three new ones every year because we have a lot of mosquitoes