hygger Auto On Off LED Aquarium Light 12-17 Inches Dimmable 7 Colors Full Spectrum Fish Tank Light Fixture for Freshwater Planted Tank Build in Timer Sunrise Sunset

UPDATE Dec 30, 2022:Hygger has been very good throughout this issue, always getting back to me, and exchanging lights. As it turns out, there was a firmware mistake which prevented the Dusk function from working properly. Once they ran some tests on a returned light, they discovered it, and they readily admitted it. They then let me know when the batch with the new firmware would be available.The updated version works perfectly! This light is great for plants and put out plenty of visual light. My wife's plants do very well with it.And Hyyger's Customer Service is excellent as well!Initial Review:My wife needed a light for a new 20 gal planted tank. We already had the same model in 48in/72W. So, the 26W light was the choice, mainly because of the brightness. The problems are simple: Programming. My other, bigger big light is exactly the same way, a pain.Our first 26W unit couldn't be programmed properly. Since they didn't bother to send a manual, we used the one from our nearly 4 year old unit. Since I was somewhat used to them, programming didn't seem to be too bad. All I did was set the time, and the length of time I wanted the light on. That way, it should ramp up, and then ramp down prior to going on and off, simulating dawn and dusk. Dawn worked fine, but I could not stop dusk from ramping down halfway, and then switching off completely.After pulling my hair out, I sent it back for a replacement. The new one made it with a manual, but I had the same issues. The manual is very incomplete, and in English written by someone who is Chinese. It really needs to be rewritten by someone who really speaks English, and a Troubleshooting section added.Sunset and sunrise are mirror images of each other. Increase to about 50%, wait 1 hour, and then over 15 min increase to 100%. Sunset should be the same. Decrease to 50% over 15 minutes, hold that for an hour, and then decrease to off, over 15 minutes. Our light decreases to about 2% and holds that for an hour.Still awaiting a reply....This could be a 5 Star light, even though it is made in China, but it's poor programming methods hurt it badly!

Excellent Aquarium lights! I use these for my vivariums & they work spectacularly. I did a lot of research before buying these lights & the hygger brand was highly recommended & I can see why. They have many customization options, & my favorite is the DIY cycle so you can set brightness/color/time for the entire day. The only gripe I have (which is a common gripe I read online) is that the instructions are confusing & it can be hard to set up until you figure out what to do. But once I knew how to operate the lights they have been great & my plants are thriving. I definitely recommend these lights for an aquarium/vivarium setup.

Purchased 2 of these lights to replaced a 34" aquarium light hood that had 4, 24", 24 watt T5-HO bulbs.I had 2 units over a covered 29 gallon glass terrarium (34" l X 12" w) between 6 in-12 in from the light for sundew plants that have high light requirements.And yes, the units hang a bit over the edge on the ends due to my error of not measuring first. This resulted in the need to ghetto fix how they are mounted onto the terrarium.The provided mounts put a bit of space between the top of the tank and the lights, this reduces and spreads out the light and keeps the aquarium on the cooler side. That gap in space also causes a reflection of the light from the glass/water underneath, blinding anyone walking past if the aquarium sits low. A 1" reflector or hood attachment along the sides of the unit would solve this and allow more light utilization (Why light up the ceiling???), but manufactures seem to ignore this in most LED aquarium lights due to how they focus light in one direction.The light's metal outside casing is hot and put off quite a bit of heat. Hot to touch but does not burn the skin immediately(~130-160F). The glass cover shields most of that heat, and the plants seemed happy continuously flowering.The light is very bright on 100% brightness but dimmer than what I expected for 60 watts of LED. The light is focused more in a downward direction when 6"-12" away, so full sun plants need to be directly under the light thus the need for 2 units.The timer/dimmer/light color functions are nice which is why I bought the 2 units in the first place. Figured I could dim them if there was too much light, but too little light would require another more expensive purchase.Overall happy with the units themselves at this price range.A major drawback however is that the power supply failed on one of the units after 11 months of use. I knew at this price range something would give eventually but I have never had a power supply fail before. At least its an easy fix if I can find a replacement.Update: increased rating by one star due to the company contacting me after the review and quickly replacing the power supply at no cost. Considering I purchased this 11 months ago, there was no obligation to replace it. Nothing beats good customer service.