less than 16 € the three, I recommend, beyond, look better !!

Green is super powerful, we see the beam in the dark, and even to heaven provided there is some moisture in the air. In open it exceeds the kilometers without problems. Purple is really powerful but not enough to keep a cat in an apartment.
By cons very disappointed with the red that works intermittently, I have not had a bowl.
Very reasonable delivery time for something that has come so far.