Published: April 19, 2021 - By: - Categories: Equipment

All great aquariums need great lighting and one of the simplest and boldest options is a submersible aquarium LED light. These underwater lights will save you on your electricity bill and allow you to display your aquarium in new, interesting ways that reflect your style and personality. Read on to learn more about some of the submersible aquarium lights for your fish tank.

Best submersible aquarium LED lights

Model Our rating Size For tanks LEDs Modes
Smiful colorful submersible aquarium LED light editor's ratingSmiful colorful submersible light #ad 23″ (7.5″-23″ available) Fish only, low light plants 33 RGB LEDs 4 color-changing modes, 16 colors, dimmable
Nicrew 15 editor's ratingNicrew submersible RGB light #ad 15″ (7″-15″ available) Fish only, low light plants 21 RGB LEDs 4 color-changing modes, 16 colors, dimmable
Mingdak 15 editor's ratingMingdak multi-color LED light #ad 15″ (7.5″-23″ available) Fish only, low light plants 21 16 colors adjustable and dimmable
Mingdak 7.5 editor's ratingMingdak blue & white with timer #ad 7.5″ (7.5″-18.5″ available) Fish only, low-light planted 18 (9 white, 9 blue) 3 modes, dimmable, built-in timer
Nicrew 2 editor's ratingNicrew multi-colored LED air stone disk #ad 2″ diameter (2″-4″ available) Colorful display tanks 6 with or without bubbles
Smiful submersible underwater white LED light, 7.5 editor's ratingSmiful submersible white LED light #ad 7.5″ (7.5″-15″ available) Fish only, low-light planted 9 white LEDs white only

Submersible aquarium light reviews

Smiful colorful submersible aquarium LED light, 23″

For aquariums that measure 24″ or wider, this submersible aquarium LED light from Smiful is a great choice. With 4 different modes and 16 light colors to choose from, you can customize the look of your aquarium to suit your needs. This submersible aquarium LED light is safe to use and will save you on electricity as a result of its low 2-watt power consumption. To increase the brightness of the output of this light simply press the ‘light rise’ button and the ‘light down’ button to dim it.

Smiful colorful submersible LED lightSmiful colorful submersible LED light #ad

The controls are pretty straightforward on this model and you can adjust the speed of the color changes in the different modes by using the same buttons on the remote as for dimming or increasing brightness. This submersible aquarium LED light uses 5050 LED chips that are 20% brighter and with a tough but clear acrylic covering, the light transfer into your tank is excellent.

Nicrew 15″ submersible RGB aquarium light

At 15″, this submersible aquarium LED light from Nicrew is great for smaller aquariums with a length of 16″ or more. This size light can also be orientated vertically in tanks that measure more than 15″ from the substrate to the water surface. This submersible aquarium LED comes with a remote control so you can easily change the lighting modes, select from 16 different colors, or change the intensity of the lighting.

Remote controlRemote control #ad

This light features a flash, strobe, fade, and smooth mode, which you can simply select using the buttons on the lower right-hand side of your remote. Additionally, you can select the color of your choice from 16 displayed on the remote and adjust the brightness as well.

Mingdak 15″ multi-color LED light aquarium kit

The Mingdak 15″ submersible aquarium light comes with a remote so you can change between 16 light colors. You can also set the brightness of the light using the buttons on the top left-hand side of the remote to find exactly the right light and color to suit your mood.

Multi-colors for choiceMulti-colors for choice #ad

With this light, the color scheme of your tank can be customized exactly as you want it, or you can simply use the white light for natural colors. This light is certified at IP68 waterproof and can be safely submerged and set up underwater in your tank to really bring your underwater world to life. Just remember not to submerge the power supply, IR sensor, or remote as they are not waterproof.

Mingdak 7.5″ blue & white submersible LED light with timer

This blue and white submersible LED aquarium light from Mingdak is ideal for smaller aquariums with a natural or marine color scheme. For larger aquariums, you could consider using more than one, on either end of the tank. This light comes with a built-in timer which is an incredibly handy feature, saving you money and making it simple to set up a natural day/night period for your fish and plants.

Multi-function controlMulti-function control #ad

The 4 button multi-function controls are straightforward and easy to use. You can choose between a 6, 10, or 12 hour light cycle. The multi-function controls of this unit have 3 colors to indicate which timer mode you are in. Setting the light to a 10-hour cycle, for example, will activate a red light on the controller, indicating that the lights will go off after 10 hours and come back on after a further 14 hours.

3 lighting modes3 lighting modes #ad

Brightness is easy to adjust and you can set the output through 10 steps from 10%-100% on either white, blue, or a combination of both light colors. Although you can use this 3.6-watt light for planted tanks, it will only be sufficient for low-light plant species. Be advised that the multifunction controller is not waterproof.

Nicrew 2″ multi-colored LED aquarium air stone disk

If you’re looking to liven up your tank with more color and bubbles, this is the submersible light for you. The Nicrew 2″ multi-colored LED aquarium air stone disk works by creating a stream of bubbles that beautifully capture the light produced by the 6 color-changing LEDs.

Nicrew multi-colored LED aquarium air stone diskNicrew multi-colored LED aquarium air stone disk #ad

To use the bubble function, you’ll need to connect an air pump (not included) and allow the disk to soak for at least one hour before using. Running an air pump is great for your fish because it actively increases the dissolved oxygen available to your fish. A length of 4.5mm air tube is supplied with the product. Over time, if algae collects on the disk, simply use a small brush to clean it off.

LED aquarium air stone diskLED aquarium air stone disk #ad

This light can be attached to the glass of your aquarium, using the 3 suction cups provided, or simply anchored on the bottom of your tank using some aquarium gravel.

Smiful submersible underwater white LED light, 7.5″

This 7.5″ submersible aquarium LED light is a great choice if you’re looking for an easy-to-use white light for your fish only or low light planted aquarium. This light uses 9 white 5050 LED light chips to provide bright, long-lasting light.

This is a basic, general-purpose light that has a simple on/off switch that should not be submerged. Installation of this unit could not be easier, simply use the two supplied suction cups to secure the light in the area of the tank of your choice.

Submersible vs external aquarium lights

Submersible LED lights tend to be well priced, appealing to the budget-conscious fish keeper. Their compact size also means there’s less hardware to distract the viewer when observing your aquarium. Submersible aquarium lights can be used externally, which is why some people choose these lights for reptile enclosures and other non-aquarium uses.

One of the biggest benefits of submersible LED aquarium lights is their ease of use. The suction cups used to secure these lights need no tools or handyman skills, simply press against the glass, inside or outside the tank and the light is secured. These lights can be orientated vertically, horizontally, diagonally, or any way in between and can be set up at the side of an aquarium, at the back, or even at the bottom, the choice is yours.

One of the greatest benefits of LED technology is its low power consumption, which will save you money in the long run. These lights don’t only look cool, they also stay cool, which means they won’t heat up your water or burn the fish and animals in your tank. Submersible LED aquarium lights with built-in timers are especially handy because they make it easier for you to set a natural photoperiod in your aquarium.

Many people prefer a more unnatural color scheme in their aquariums, with shades that suit their moods or the color scheme of their room or office space. For this purpose, submersible color-changing lights are the ideal choice and many models come with different modes and brightness settings to customize the lighting to suit your preference.

Unfortunately, the submersible aquarium LED lights listed here are not suitable for plants with medium and high light requirements and external options would be a better choice for heavily planted aquascapes. For more information on lighting for planted tanks, read this article.

Frequently asked questions

Can you grow plants with submersible aquarium lights?

Submersible aquarium lights that have white light LEDs can be used in planted tanks, but only for low light plants like Java ferns. Unfortunately, colored LEDs do not provide suitable light for growing plants are much better for fish-only tanks.

Are Submersible LED lights safe for my fish?

Submersible LED aquarium lights are safe for fish because they are designed for underwater use, which means they are properly insulated and sealed to prevent electrical discharges in the water. LED technology produces very little heat, which means your fish or other animals won’t be burned if they come into contact with the light. Additionally, these lights will not heat the water to a significant degree.

Lucas has been keeping successful fish, planted, and reef tanks for many years. He loves to collect aquatic organisms and keep as many aquariums as he can.

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