LED Aquarium Light, Colorful Submersible LED Light Waterproof USB Underwater Light for Aquarium Fish Tank

The media could not be loaded. Love how it lights up the skull I have in my tank. Makes a decent night light. Cord is a bit short for my situation. Had to run an extension cord to it.

nice under water light

Somewhat difficult to get it to stay in place. The cord could be a bit longer. I have a 20 gallon aquarium and had to constantly reposition it.I have since removed it from the aquarium.

We're not throwing a rave for these fish, just needed to provide some light since they are in a dark part of the room. after plugging it in and realizing the colors are constantly changing I thought "if I was a fish I would go insane if this light was in my world". So I unplugged it and sent it back.

The four color lights blink alternatively, and there is no control for it. They are bright but not overpowering, providing nice illumination. USB powered allows for versatility and low power consumption. Perfect to place inside ornaments like Sunken Ships or Castles.

The media could not be loaded. This little ring light is pretty nice. The four colors are red, green, blue, and amber. It cycles through the colors with a wave scheme every second or so, however it doesn't quite cover the full spectrum. Other reviewers mentioned that is flashes, and this is not the case. It's a smooth transition. Although you can't tell in practice, on its face it appears that the amber LEDs are not as bright as the others, however this is not the case. It's fairly bright for its size, however you're not going to lead a dive with it, which I would think is actually a good thing when used as the intended aquarium light. I certainly wasn't looking for spot-light intensity.It's the only water-resistant light, powered by USB, I could find on Amazon that was a compact, ring design, opposed to a strip, that wasn't integrated into an aquatic air stone. I was looking for this shape because I personally use it in my cat's vortex water fountain, which is round of course, to more easily see the water level along with giving it some style. It also just so happens that it fits perfectly around the spout the pumps the water into the dish above, so there is no need to secure it otherwise, however it is not centered this way. If you happen to use it for this application as well, it's likely going to fit other fountain spouts as well since they all have similar size motors in them.I actually ended up sending this back since I couldn't natively secure it to a flat surface without any integrated suction cups on the bottom of the unit. I tried securing it to the port of a larger suction cup (~>=2"), and this got the job done, however it was not ideal for a few reasons that I won't elaborate upon.

Pretty cool LED/RGB waterproof light with a usb cable and what seems to be a light breathing mode where it fades into other colors. It's fairly bright and compact. I think it's pretty nice!

The changes looked like rapid blinking.It didn't say that in the description. It frightened my fish and irritated me. I returned it.