POSITIVES:
-With a photocell. It stays permanently in the socket and turns on as soon as the light goes out, and turns off as soon as the light is sufficient again.
-With various colored papers that you put inside, you can change the color of the light.
NEGATIVES:
-Bad design. If you put it in a power strip, it takes up two slots, it is too big.
-Very low light level. Whether it is on or off, it is the same.
-If you put any of these colored papers that it comes with to change the color of the light, it gets worse, you can't even see where it is to remove it from the socket.
Bad choice, not worth it.