See attached photo: Just in case you were wondering this is not the proper use of a brand new fly light. Yes, this is where I found it during my last service call. Three weeks prior, it was an emergency, and was needed ASAP to get the flies under control. It’s a little irritating after making an effort to get them what they needed as soon as possible then to find it left in the box for things to be stacked on.
Fly lights actually do a good job to keep populations in check when used properly. Call for pricing and installation.