I read the article with great interest. However, they mentioned using a red acrylic sheet. The issue, as I see it, would be to overheat the hive as you would trap infra red in the hive. I am sure the bees will have to hyper ventilate the hive. So, if this device is used, some ventilation should be provided so that the heat would escape. I wonder then if that is the overheating that deterred the SHBs. As you know, there are less SHBs in sun exposed hives.