hygger 24/7 Mode Submersible Aquarium LED Light, Full Spectrum Hidden Fish Tank Light with 3 Rows Beads 7 Colors Auto On Off Sunrise-Daylight-Moonlight, Adjustable Timer Brightness (27.6in 16W)

I had a similarly shaped light strip that I really liked--but it is not longer sold and have suffered through other styles until this one became available. Just what I wanted--and this is why. I did try it with the suction cups on the aquarium hood, but as others have mentioned, they only stay stuck for a while. I did not want to try this in the aquarium because of the way it looks, and because with other submersibles I ended up with algae growth.Then I realized--I could just take the suction cups off and attach it to the top like my other light. There are velcro-like plastic strips available, they stick together like velcro only sturdier, and they attach with strong adhesive. I still have the strips on my tank hood from several years ago, so it took seconds to stick the strips to the back of the light and put it in place. This has worked incredibly well for me. Other lights I have tried just always had issues--I have just kept the hood that came with the aquarium and wanted to replace the lights there. This works!! Many lights don't last that are this shape because they really are not supposed to get wet--since this one is submersible, getting a little wet from condensation or splashes won't damage it.I do wish it was a little easier to use the controls. I have difficulty understanding the instructions--and there seems to be no way to set the time, you just have to be there at the right time to start the timer. Someone mentioned numbers corresponding to times, but I sure don't see that on mine. I only want the light on no more than 6 hours, I think I finally have it figured out, but if this does not end up working, I will just turn the timer off and hook it up to the timer I have been using--I would prefer to be able to buy lights without these built in features, but that seems to be no longer possible.I have seen good reviews of this brand for other products, so did not hesitate to order this and was not disappointed. I have a wide screen 24 inch tank, but ordered a 12 inch light which gives plenty of light. I do have live plants, we'll see how they do, but I limit the light due to a persistent algae problem anyway. This light works great so far.

I've only had these lights for about two weeks, so I can't speak to their longevity. Hopefully they last a long time because I love these lights!I had submersible lights in my 125 gallon tank previously. They were some Chinese off brand that simply had an on/off switch. They were a brilliant, bright white with hints of blue, and since they had a simple switch they worked with smart plugs and Alexa routines.So that being said, the first thing to know about these is that they will not work with smart plugs. Once they lose power, they forget their settings. However I've found using the 24/7 timer mode to be even better. It can be a little tricky to get set because of poorly translated instructions (more on that later), but once you get it it's easy.....and the results are quite brilliant!In the morning, instead of my lights popping on instantly at 100% brightness (which as you can imagine is probably not the nicest way to wake up), these lights begin with a soft orange moving gradually to a brighter orange to simulate sunrise. Then it slowly becomes a dim white light which throughout the day increases in intensity. Eventually the white light begins to fade into a bright blue simulating moonlight, which then fades over time into a lighter blue then darkness. It's a much more natural light cycle. I believe the whole cycle results in roughly 16 hours of different types of light (6AM - 10:50PM). I'm not an expert by any means, but I do not believe this extended light cycle will contribute greatly to the growth of algae because it's not intense white light all day every day, but I could be wrong (again, it's only been 2 weeks).As for the intensity of the white light in particular (since that's in use most of the day), it is satisfactory. I purchased another brand of light before these and they absolutely PALED in comparison to the old lights I was switching away from. I returned those and bought these. These are still not as bright as the old ones but they are much closer and I suspect it's because these are more full spectrum instead of all white. But I'm obviously pleased with them, they certainly are more than good enough.As for setting the 24/7 cycle....just ignore the directions. You'll see a series of times annotated on the controller with an LED light next to them...they are military time so just do some googling on that if you need to (or just subtract 12!). Wait until one of these time frames and push the 24/7 button until the LED next to that time is lit. You're not really "setting" anything....you're telling the controller the current time and it does the rest. If you want your cycle to start or end earlier than the 6am sunrise (the default), simply lie to the controller when you set the time (ie tell it that it's 8pm when it's actually 7pm or 9pm to move the cycle forward or back by an hour - or more).One final thing to note which should be obvious from the picture but I really didn't think about it until I got them in hand.....most of the submersible LEDs I've had or looked at were a round tube secured in rings with suction cups. Because they were round, you could mount them anywhere in your tank (such as behind the rim) and simply rotate them to direct light where ever you want. These are, obviously, not round. So there is no rotating and they will only direct light directly up, down, or across from where you mount them. So keep this in mind when planning where your lights will be in your tank.Long story short, I love these lights and as long as they have a decent service life, I will 100% buy again! Will come back and add photos when I grab some (if I can add them later)UPDATE: I still love these lights, however it comes with a major caveat: I've already had to replace two due to water getting inside of them. I replaced the first hoping it was a fluke.... Now the same thing with another one. I love the lights enough otherwise that I WILL replace again, but this time the "submersible" lights will NOT be going in the water. I advise either keeping your water level low enough that the lights aren't actually submerged or mounting them top of your lids. That will present it's own problems that I have to solve because the glass reflects some of the light back into the room. But I'll figure that out...

I got this aquarium LED light and it's been working pretty well so far. I like the different colors, although it would be nice if you could adjust the brightness in the 24/7 mode. I have a shallow tank and noticed that there was more algae growth than usual after installing the light (maybe just a coincidence though?). It comes with some white paper to stick on the back of your tank as well which is cool, kind of like a hidden atmosphere thing. My roommate's dog chewed through one of the cords once, but I didn't have to replace the whole light because it has a separate adapter (thankfully).It's not too difficult to set up either. The instructions are pretty straightforward and easy to follow. It took me about 10 minutes to get it all set up and running smoothly. One thing i noticed is that you can put this thing in the water or on top of the tank, which is nice if your setup allows for it. I've been using it for a few months now and haven't had any issues with it, so overall it seems like a solid choice for an aquarium LED light. It does what it's supposed to do and looks pretty good in my fish tank.

This has been the best investment for my fish tank! I find myself rushing home just to turn on the lights. I've noticed that my fish seem much less stressed with the different colors. When I used to turn the lights on and off manually, they would get anxious. But now, with the timer set to 24/7, they really enjoy it! I highly recommend it. I simply taped mine to the lid for easy installation. The blue light signals soon bedtime for them. This price was great! I give this 10 stars!!! 🌟