Best Aquarium Light For 20 Gallon Long

Peter | 27-12-2025

With so many Best Aquarium Light For 20 Gallon Long brands on the market – from big names like AQUANEAT,hygger,SEAOURA,AQQA to smaller companies – finding the right product can be a real challenge. But we’re here to make your search easier.

We carefully researched and tested a vast range of Best Aquarium Light For 20 Gallon Long to help you discover the top contenders that match different needs and preferences. Altogether, we spent over 100 hours evaluating numerous products first-hand.

Our #1 best Best Aquarium Light For 20 Gallon Long is AQUANEAT Best Aquarium Light For 20 Gallon Long, based on its stellar performance across all our tests. Below you’ll find more of our top-rated recommendations for great Best Aquarium Light For 20 Gallon Long options currently available. Make sure to check out our buying guide too – it’s full of expert advice for choosing a Best Aquarium Light For 20 Gallon Long tailored to exactly what you’re looking for. With our help guiding your decision, finding your perfect fit will be a breeze!

Editor's Choice
AQUANEAT LED Aquarium Light Full Spectrum for 24 Inch to 30 Inch Fish Tank Light Fresh Water
AQUANEAT LED Aquarium Light Full Spectrum for 24 Inch to 30 Inch Fish Tank Light Fresh Water
Premium Pick
AQUANEAT LED Aquarium Light Full Spectrum for 18 Inch to 24 Inch Fish Tank Light Fresh Water
AQUANEAT LED Aquarium Light Full Spectrum for 18 Inch to 24 Inch Fish Tank Light Fresh Water
Budget Pick
hygger 18W 24/7 Lighting Aquarium LED Light, Sunrise-Daylight-Moonlight Mode and DIY Mode,
hygger 18W 24/7 Lighting Aquarium LED Light, Sunrise-Daylight-Moonlight Mode and DIY Mode,

Top 10 Best Aquarium Light For 20 Gallon Long

We researched and compared the top products in the Best Aquarium Light For 20 Gallon Long category to provide you with these recommendations.

1. AQUANEAT LED Aquarium Light Full Spectrum for 24 Inch to 30 Inch Fish Tank Light Fresh Water

AQUANEAT LED Aquarium Light Full Spectrum for 24 Inch to 30 Inch Fish Tank Light Fresh Water
9.8

Aquaneat

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  • Work best on 15 gallon tanks with 24 inches long; with two extendable brackets, this light also fits for fish tank from 24 inch to 30 inch long
  • Light body without docking brackets: 22.25 L x 2.7 W x0.4H. Tank thickness: No limit to rim size
  • Configuration: Total 60 LEDs, 44 pcs 6500K white LED, 8pcs blue LED, 4 pcs pink LED, 4 pcs Green LED
  • Mode: all lights on and all lights off; no timer; light brightness is not adjustable
  • Super bright and energy efficient LEDs, suitable for all freshwater NOTELIGHT IS NOT WATERPROOF,KEEP THE LIGHT AWAY FROM THE SPLASHING WATER

2. AQUANEAT LED Aquarium Light Full Spectrum for 18 Inch to 24 Inch Fish Tank Light Fresh Water

AQUANEAT LED Aquarium Light Full Spectrum for 18 Inch to 24 Inch Fish Tank Light Fresh Water
9.5

Aquaneat

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  • Work best on 10 gallon tanks with 20 inches long; with two extendable brackets, this light also fits for fish tank from18 inch to 24 inch long
  • Min size after assembled with dockig brackets: 18.5 L x 2.7 W, Light body without docking brackets: 17 L x 2.7 W. Tank thickness: No limit to rim size
  • Configuration: Total 42 LEDs, 30 pcs 6500K white LED, 6pcs blue LED, 3 pcs pink LED, 3 pcs Green LED
  • Mode: all lights on and all lights off; no timer; light brightness is not adjustable
  • Super bright and energy efficient LEDs, suitable for all freshwater; NOTELIGHT IS NOT WATERPROOF,KEEP THE LIGHT AWAY FROM THE SPLASHING WATER

3. hygger 18W 24/7 Lighting Aquarium LED Light, Sunrise-Daylight-Moonlight Mode and DIY Mode,

  • DEFAULT MODE(24/7 Natural Mode): Gradient Orange light (sunrise) from 6 am to about 8 am; Gradient White light from about 8 am to 10:00pm/22:00; Gradient Blue light (moonlight) from about 10:00pm/22:00 to 10:50pm/22:50; The 24/7 lighting aquarium lights are off in other time periods. The overall default time period can be delayed or advanced
  • DIY MODE: Time + Color + Brightness can be set. Setting time(TIMER key): There are 3 choices, it can run for 6 hours, or 10 hours, or 12 hours; Brightness(up/down key): 5 kinds of brightness. Color(ON-OFF/ M key): White, Red, Blue, Green, Purple, Orange, Cyan, PS: The light slowly ramps up and down in 15 minutes, then comes the brightness you set. Cycle Color (No Brightness Selection)
  • NEW UPGRADE: The separable adapter, if it is damaged, no need to replace the whole light to avoid waste. The extendable bending bracket can be adjusted in length and easy to install, and can be applied to various freshwater tanks. Thicken aluminum to increase heat dissipation efficiency. Power-off memory function, whether it is 24/7 mode or Time mode, other settings remain unchanged, only the start time changes, the default operation starts at 6 am
  • USEFUL HELPERS: The light is soft, the color rendering index is close to natural light, up to 85%, protecting eyes and fish, to refuse the discomfort caused by stroboscopic for fish and viewers. Using high-quality 2835 + 5050 model lamp beads, long service life, at least 50,000 hours. Lamp beads waterproof, the light is easy to clean and wipe, No need to worry even if it falls into the water briefly
  • PRODUCT PARAMETERS: Power:18W; Led QTY:98 PCS(White:48 PCS/BLUE:18 PCS/ RED:7 PCS/GREE:5 PCS/ RGB:20 PCS); CRI:85; Application(for Fish Tnak Long):18-24 ; Power Cord: 4.9 ft+2.3 ft; Input Votage:AC100-240V; Output Votage:DC20V; Kelvin: White 6500K, Blue 455 nm, Red 620 nm, Green 560 nm; Lumens:1075

4. SEAOURA Led Aquarium Light for Plants-Full Spectrum Fish Tank Light with Timer Auto On/Off, 18-24

SEAOURA Led Aquarium Light for Plants-Full Spectrum Fish Tank Light with Timer Auto On/Off, 18-24
8.9

Seaoura

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  • [DIY MODE] :Time, Colour and Brightness 3 setting choose. Timing (Timer control key): 3 choices timer running for 6 hours, or 10 hours, or 12 hours; Brightness/On-Off key: 10 level brightness and Switch function. Colour(W/B key): 3 colour modes choose, All lights on, White/Red/Green/Pink, Only Blue
  • [Full Spectrum Aquarium Light] :With full spectrum lighting, which is helpful fish and aquatic plants growth, fit for all fresh water tanks. The controller is very simple and no complicated operations. Suitable for all starters to experienced fish tank lovers to use
  • [High-quality Led& High CRI]: Using high-quality SMD2835 led chips. 6500k white light, red light, pink light, green light and blue light, the light is very soft and beautiful, and the colour rendering index is up to 89%, which is similar to natural light
  • [5 columns of Led Chips, Extendable Metal Bracket]: Compared with other tank lights, up to 5 columns of led chips, they are more compact and beautiful. Good heat dissipation of the ABS shell. Use the stable and durable metal bracket, adjustable extendable bracket fit for most gallon tanks
  • [Application Size & Memory function]: The aquarium light fit for 18 inch-24 inch tank. In case of power failure, the setting remains the same as before, and the start time will restart counting after the power is turned on. PS: The light rises slowly in 15 minutes and gradually decreases in the last 15 minutes. It is very friendly to fish. You can easily to install this led fish tank light on most of glass or acrylic aquarium tanks, with transparent hood/lid or no, with rims or rimless

5. AQQA LED Aquarium Light, 24/7 Mode Clip on Fish Tank Light with Memory Function, DIY Mode Full

  • HIGH QUALITY AQUARIUM LIGHT - The widened and thickened aluminum gloss shell is more beautiful and durable. Wider surface makes the heat dissipation effect of the light better. Premium 5050 and 2835 leds provide all the lights the plant need, perfect for plant growth.
  • DIY MODE - You can DIY modes as you like, there has a switch that can adjust brightness & setting time & on/off button & change the light color or enter the cycle color. 5 levels light brightness; 3 lighting timer setting choices (6H/10H/12H); 7 light colors + full spectrum + auto color cycle.
  • 24/7 DEFAULT MODE - Simulates natural living environments, starting with warm orange light at sunrise, moving to 100% brighter full-spectrum light at noon, and then to starry blue light at night. The default light turns on automatically at 6 am and off at 22:58. The automatic on/off time can be postponed or advanced the overall default time period.
  • FLEXIBLE ADJUSTABLE LIGHT - With a 7-inch long 360 flexible gooseneck tube, you can easily adjust the angle and direction of the light and support move left and right freely. With aluminum alloy clip, equipped with screws for tightening and are safe to use on framed or frameless aquariums up to 0.9 inches thick.
  • MEMORY FUNCTION - In the event of a power outage or close, the light will retain its previous settings and mode. Once the power is restored, the light will light up in the previously set color, brightness, and lighting time without resetting.

6. AQQA LED Aquarium Light, 24/7 Mode IP68 Waterproof Extendable Bracket Fish Tank Light, DIY Mode Full

  • HIGH QUALITY AQUARIUM LIGHT: Built in widened and thickened aluminum gloss shell is more beautiful and durable. Wider surface makes the heat dissipation effect of the light better. Premium 5050 and 2835 LEDs provide bright illumination for plants and fish, ehancing the aesthetic appeal of the fish tank.
  • DIY MODE: You could DIY modes as you like, there have switch that on/off button & change the light color or enter the color cycle & brightness & timer setting. 9 light colors available; 10 levels light brightness; 3 lighting timer setting choices (6H/10H/12H).
  • 24/7 DEFAULT MODE: Simulate a 24-hour sunrise and sunset pattern to promote the growth of plant life, starting with warm orange light at sunrise, moving to 100% brighter full-spectrum light at noon, and then to starry blue light at night. The default light turns on automatically at 6 am and off at 23:00. The automatic on/off time can be postponed or advanced the overall default time period.
  • IP68 WATERPROOF AQUARIUM LIGHT: The highest level of waterproof ability could be directly soaked in water for use. Suitable for plants and freshwater: The full-spectrum bulbs can produce various colors depending on your preference.
  • EXCELLENT ALUMINUM ALLOY MATERIAL & EXTENDABLE BRACKET: High quality metal aluminum housing, easy to clean, fast heat dissipation. With 8 inch long bracket, makes the LED light to fit different-sized aquariums within an extendable range.

7. AQUANEAT LED Aquarium Light Full Spectrum for 30 Inch to 38 Inch Fish Tank Light Fresh Water

AQUANEAT LED Aquarium Light Full Spectrum for 30 Inch to 38 Inch Fish Tank Light Fresh Water
8.3

Aquaneat

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  • Work best on tanks with 30 inches long for full cover effect; with two extendable brackets, this light also fits for fish tank from 30 to 36 inches long
  • Light body without docking brackets: 27.7 L x 2.7 W. Tank thickness: No limit to rim size
  • Configuration: Total 72 LEDs, 52 pcs 6500K white LED, 10 pcs blue LED,5 pcs pink LED, 5 pcs Green LED
  • MODE: all lights on and all lights off; no timer; light brightness is not adjustable
  • Super bright and energy efficient LEDs, suitable for all freshwater. NOTELIGHT IS NOT WATERPROOF,KEEP THE LIGHT AWAY FROM SPLASHING WATER

8. AQUANEAT LED Aquarium Light for 18 to 24 Inch Fish Tank, Auto On Off with Timer, Full Spectrum,

  • Built-in Timer: three timing modes: 4, 8, 10 hours;Short press the alarm icon to choose the time, light will automatically be off and on at the time you set
  • Brightness adjustable: 5 levels of brightness in total from 100% to 20% according to your prefer; Just Press the Plus Minus Button; The light is soft, close to natural light, it's gentle on the eyes and will not harm your fish; Suitable for all freshwater, low media light plant
  • Daylight Mooonlight: 3 groups of LED lights, each group can be turned on and off separately: Group 1: All lights(White + Pink + Green+ Blue) on for cool daylight effect; Group 2: All lights except blue lights (White + Pink +Green) on for warm daylight effect; Group 3: 6 blue lights on for moonlight mode
  • Work best on 10 gallon tanks with 20 inches long; with two extendable brackets, this light also fits for fish tank from18 inch to 24 inch long; Light body without docking brackets: 17" L x 2.7" W. It's easy to install on most glass or acrylic aquarium tanks with transparent hood/lid or no, with rims or rimless;Slim and sleek: save enough room for aquarium filters and other aquarium pumps
  • Super bright , energy efficient and Long lasting 5730 LEDs with no bulb replacement required; Total 36 LEDs, 24 pcs 6500K white, 6 pcs blue , 3 pcs pink, 3 pcs green; NOTE KEEP THE LIGHT AWAY FROM THE SPLASHING WATER.

9. hygger Clip On 24/7 Lighting Aquarium LED Light,Sunrise-Daylight-Moonlight and DIY Mode, Adjustable

  • DEFAULT MODE(24/7 Natural Mode): Gradient Orange light (sunrise) from 6am to about 8am; Gradient White light from about 8am to 10:00pm/22:00; Gradient Blue light (moonlight) from about 10:00pm/22:00 to 10:50pm/22:50; The 24/7 lighting aquarium lights are off in other time periods. The overall default time period can be delayed or advanced
  • DIY MODE: Full spectrum aquarium light also can change the time + brightness + color. Setting time(TIMER key): 3 kinds of time, 6h, or 10h, or 12h; Brightness(up/down key): 5 kinds of brightness. Color(ON-OFF/ M key): White, Red, Blue, Green, Purple, Orange, Cyan, Cycle Color (no brightness selection)
  • NEW UPGRADE: Clip style bracket( tank walls less than 0.9in thick), easy to install, aquarium LED light can be used for different thickness of glass, the body of the fish tank light can be taken off and installed horizontally or vertically. The separable adapter, even if it is damaged, no need to replace the whole light to avoid waste. Thicken aluminum to increase heat dissipation efficiency
  • USEFUL FISH LIGHT: The hygger aquarium light is soft, the color rendering index is close to natural light, up to 85%, protecting eyes and fish, to refuse the discomfort caused by stroboscopic for fish and viewers. Using high-quality 2835 + 5050 model lamp beads, long service life, at least 50,000 hours. Easy to maintain
  • 14W PRODUCT PARAMETERS: Power:14W; Led QTY:68PCS(White:32PCS/BLUE:12PCS/ RED:7PCS/GREE:3PCS/ RGB:14PCS); CRI:85; Application(for Fish Tnak long):12-20 ; Power Cord: 4.9ft+2.3ft; Input Votage:AC100-240V; Output Votage:DC20V; Kelvin: White 6500K, Blue 455nm, Red 620nm, Green 560nm; Lumens:817

10. SEAOURA Led Aquarium Light for Plants-Full Spectrum Fish Tank Light with Timer Auto On/Off, 12-18

SEAOURA Led Aquarium Light for Plants-Full Spectrum Fish Tank Light with Timer Auto On/Off, 12-18
7.7

Seaoura

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  • [DIY MODE]: Time, Colour and Brightness 3 setting choose. Timing (Timer control key): 3 choices timer running for 6 hours, or 10 hours, or 12 hours; Brightness/On-Off key: 10 level brightness and Switch function. Colour(W/B key): 3 colour modes choose, All lights on, White/Red/Green/Pink, Only Blue
  • [Full Spectrum Aquarium Light]: With full spectrum lighting, which is helpful fish and aquatic plants growth, fit for all fresh water tanks. The controller is very simple and no complicated operations. Suitable for all starters to experienced fish tank lovers to use
  • [High-quality Led& High CRI]: Using high-quality SMD2835 led chips. 6500k white light, red light, pink light, green light and blue light, the light is very soft and beautiful, and the colour rendering index is up to 89%, which is similar to natural light
  • [5 columns of Led Chips, Extendable Metal Bracket]: Compared with other tank lights, up to 5 columns of led chips, they are more compact and beautiful. Good heat dissipation of the ABS shell. Use the stable and durable metal bracket, adjustable extendable bracket fit for most gallon tanks
  • [Application Size & Memory function]: The aquarium light fit for 12 inch-18 inch tank. In case of power failure, the setting remains the same as before, and the start time will restart counting after the power is turned on. PS: The light rises slowly in 15 minutes and gradually decreases in the last 15 minutes. It is very friendly to fish. You can easily to install this led fish tank light on most of glass or acrylic aquarium tanks, with transparent hood/lid or no, with rims or rimless

Peter

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