hyggerSubmersible LED Aquarium Light, 24W 26.8 in 24/7 Mode Fish Tank Light with 5 Rows Beads, with Timer 9 Colors and Adjustable Brightness, Full Spectrum IP68 Waterproof Light for Fish Tank 28-54in

Bright, low-refraction lighting, easy to use controls, for the most part all around great.A few things, though:One quirk I see is that it aims down more than out, so even with it well-elevated over a nano aquarium there's a lot more dark spots in the corners than with the previous LED light I was using. Conversely, the parts it shines directly on (ie, straight down from it) are much brighter and clearer than before. Might be better to use two of these (with the brightness turned down a bit if necessary) if you're wanting a more thorough coverage. If you're wanting to spotlight the front of the aquarium, however, it's ideal.Another quirk is that the 24/7 setting doesn't allow clock setting to the minute. Which is fine, don't really need it that precise, but it might make it a bit awkward to coordinate multiple lights to smoothly turn on together if someone does decide to get multiple.A bigger issue is that the suction cups just won't hold. They did fine on my initial dry tests, but they just won't stay on the roof or walls of the damp/wet aquarium environment for more than a few moments before coming off. So other than being able to use them to stabilize the light if you're placing it on a transparent cover, I don't see any real use for them. Definitely look into a mounting alternative if you were planning on relying on the suction cups to hold the light.Other than that, nothing else that comes to mind to negatively point out. Rather, the rest is all much better than I expected, especially for the price. Definitely going to be my go-to brand from now on. <3

AMAZING lights. Very impressed with the 24/7 feature. Love love, love these lights.

Setup for 24 hours took me a few minutes to figure out but once it's set, there's no additional changes I need to make. I love how the lights move through sunrise to moonlight each day. It feels so much more natural than just turning on/off the light. You do have options to use without the 24-hour setting and can adjust the brightness as needed but I prefer the sunrise to moonlight each day. I also like that it's submersible. I don't like my tanks to be partially filled and with the lights being submersible it's a nice look. The only issues I have are that the light is fairly thick so when attached to the tank lid, the lights do hang into the water. Not a huge issue but I see the light fixture. The other issue is placement. Due to my tank lid already preset for a thinner light, there are only a couple flat areas on the lid to attach the suction cups to hold the light. I have to place the light at an angle for the suction cups to adhere. These are not related to the light but the lid. I'm very happy with the 24/7 mode and love not having to turn on/off each day.

The media could not be loaded. Hygger Pro HG135-21 the box states 24 inches actual size is 23 inches and 1/8. this is an awesome price for this type of quality. The warranty is two years. I purchased a bowfront tank with hood. The light fixture is built into the hood, but it’s not a plant light. This fits under the hood and has many different settings, which are easy to access and controlworks perfect for me.

The media could not be loaded. I love this light. My tank came with a very bright white light. My poor fish were either in the dark or in the spotlight. With this light it brightens up slowly. And turns dark slowly. The bright white also has other colors in it which makes the colors in both my fish and ornaments pop. It goes on and off all by itself. Once I got it set it woks perfectly. The only complaint I have is the instructions are so tiny that I finally copied it 200x so I could read them.

The media could not be loaded. I have a 40 gallon BioCube and I needed something that would stick to the top. This fit the bill. It has different light modes, timers settings. Everything you could want. Excellent price and fit in the converted freshwater BioCube perfectly. I definitely will buy another one of these and I recommend these 100% five stars all the way.

This light works but goes out after a few exposures to water

Took me a little bit to actually get the instructions out and figure out how to program the 24 hour cycle, but once I did i love not having to mess with turning it on and off manually. I like the fades mimicking sunrise and sunset and the option to change the colors on manual mode.