I don't know
It seems as though the light is really the main attraction. Nonetheless, I'll take any help I can get.

Complete waste!
With flys in overload and my traps catching tons, this lure attracted absolutely zero flys to my flowtron zapper..

Big disappointment

A whole lotta money for very little product
Don't let the size of the box fool you. Even though this item comes packaged in a good-sized box, this product is barely one inch by two inches. It's just a small piece of plastic with some type of pheromone embedded in it. Although it does seem to attract flies for a few days, it doesn't seem to last for very long at all. It's just a tiny piece of flimsy plastic! In my opinion, it's just not worth it.

Amazing!
On my porch in my backyard, there used to be tons of annoying insects flying around, because we live very near to a pond and we have woods. Ever since I got this terrific product, I have been bug free for almost 3 months now!I can go back to having bar-b-ques again! This is the most amazing product ever created!