This light is pretty worthless.  It kills lots of moths and other non-biting bugs but didn't put a dent in the mosquito or fly population.  I got this as an alternative to my unreliable SkeeterVac but it does not work and is equally unreliable.  The bulbs blew after 1 season.  Replacement bulbs are $40 each plus shipping.  It takes 2.  That is $90 for 2 bulbs and I only paid $80 for the whole unit.  Thanks but no thanks.