I was looking for something really bright, that will really shine under a patio covered outdoor area where it would be like a regular indoor room. And boy did it! I had 150W for that wasn't bright enough. Since my area is smaller I adjusted sensor to be minimum, and it works good for that purpose. Can't comment on sensing open areas for this model, but I have the 2-light version and that can keep the lights on many hours with few flies/bugs continue drawn to the lights.
I read the review on possible burning/fire if sensor/logic failed and kept the light on. So I took a closer look at the casing. The glass seems like real glass (heavy), not cheap clear plastic. The chasis/enclosure is heavy too. It's definitely not plastic. Seems like metal as that's how it feels when I knock on it with my knuckles. There is reflective sheeting around the bulb too. The thing that locks the glass to the enclosure is a metal sheet hinge, which shouldn't melt either. The arm between the light casing and the wall is also the same, metal-feel material. The only thing feel plastic is the motion sensor below, but it's like a good 4 inches so shouldn't be an issue.
This light fixture is bright enough where I'm going to order couple of more to shine onto my dark street in the cul-de-sac, where some neighbors were the victim of 3am car burglary. My only concern is whether a driving rain storm could cause water to enter the light enclosure. A normal rain shouldn't, but strong rain that has the right slant might get a few drops in. But given the glass is not sealed all the way around, including the bottom, any "drops" of water *IF* gets in should just come right out also.