Riff-raff as pigeons, squarels and cats? 
If it really works, I am in.
We are going on a gutter snipe hunt tonight.
What I need you to do is stand under this light with a pillow case while I go out and drive the snipe to you.
You stay right here. Ok?
In case anyone is wondering how these look, I have a similar product that I bought locally at “The Home Center”. I personally like them and the one over the grill is helpful in the still warm but sun sets early days of the year.
From a pic showing the underside it appears these have 3 LEDs. In 2019 Leyeet motion activated 9 LED lights units worked and still work great. They are bright. But I question 3 LED lights for anything other than saying here is my gutter. The above pics seem to do ok with multiples installed.
How many lumens?
It IS a nice gutter!
The only thing that makes me think they could be problematic is if you (like me) have gutter guards for leaf debris etc… Not sure how else they would clip on 
I have this same question
I say what happens in the gutter is nobody’s business.