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Extendable Aquarium LED Light Bar

Telescopic arms, so one lamp fits several tanks.

Telescopic legs mean one lamp fits several tank widths, so it moves with you when you upgrade rather than becoming the wrong size the moment the tank changes.

£26.99

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  • Telescopic legs extend to span wider tanks
  • 8500K daylight tone at 2300 lumens
  • Ships with a UK three pin adapter
  • Rated for freshwater and marine tanks
  • Rocker switch on the housing, no fumbling at the socket

Size: 36 LED (smaller tanks)

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Why you'll love it

Made for happy, healthy pets

Tanks get replaced, lighting shouldn't

A fixed width lamp is scrap the moment you upgrade the tank. Legs that slide mean the same bar carries over, which is why this outlives two or three tanks in practice.

8500K is the tone plants actually want

Warmer bulbs make a tank look yellow and do little for planted growth. 8500K reads as daylight, so greens stay green and fish colour is not flattened out.

A UK plug, not an adapter on an adapter

Most aquarium lighting at this price arrives with a two pin EU plug and a travel adapter hanging off it behind the cabinet. This ships with the right head fitted.

Good fit if

  • Replacing a dim or failed hood light
  • Anyone likely to change tank size within a few years
  • Marine as well as freshwater setups
  • Buyers who want a UK plug rather than an adapter chain

Look elsewhere if

  • You want built in dimming or a timer, which this lacks
  • You keep demanding high light plants needing a dedicated unit
  • Your tank has a solid hood with no rim to sit legs on

Colour temperature and what it does

Eight and a half thousand kelvin is a cool daylight tone. It renders greens and blues cleanly, which makes a planted tank look natural rather than yellow, and it sits in the range most freshwater keepers settle on. Warmer light makes a tank look muddy; much cooler starts looking clinical.

For plants, colour temperature matters less than people assume. Plants use light across the spectrum and respond mainly to intensity and duration. Colour temperature is largely about how the tank looks to you, which is a legitimate reason to care about it but a different question from growth.

Duration over intensity

The single most useful thing you can add to any aquarium light is a plug in timer. Six to eight hours a day suits most freshwater tanks, and consistency matters more than the exact figure. Leaving a light on all evening because the tank looks good is the most reliable way to grow a green film on the glass within a fortnight.

If plants are struggling, the answer is usually more intensity rather than more hours. Algae outcompetes plants when light is plentiful and something else is limiting, so a long weak photoperiod feeds algae and starves the plants. Shorter and brighter is the direction to move.

Fitting and depth

Light falls off quickly with depth, so a deep tank needs a stronger unit than a shallow one of the same footprint. Measure the outside width across the rim, since the legs rest on the frame rather than inside it, and check the extended span covers that before ordering.

Position it centrally along the length so the front glass and the back corners get roughly even coverage. Sitting it on a glass cover rather than over an open tank extends its life considerably, because the constant evaporation off an open surface is what eventually gets into the housing.

Keep the tank out of direct sunlight regardless of what light you fit. Sun through a window adds hours you have not accounted for and varies through the year, which is why a tank on a sunny sill grows algae that no amount of adjusting the lamp will fix.

In the box

Everything you need

  • LED bar
  • UK power adapter

How it works

Simple, from basket to doorstep

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The details

Specifications

Colour temperature
8500 K
Output
2300 lumens
Power
Input 110 to 240 V, output DC 12 V 2 A
Span
Extends to about 95 cm
Suits
Freshwater and marine
Certification
CE, RoHS

Size guide

VersionSuitsNotes
36 LEDSmaller tanks, up to about 60 cmAdequate for low light plants
72 LEDWider tanks, up to about 95 cm spanBrighter, better for a planted setup

Measure the outside width across the tank rim, since the legs rest on the frame. For a deep tank choose the higher output, because intensity falls off sharply with depth.

Loved by real pet parents

4.5· 11 reviews
Tropical community tank

Legs slide, so it moved tanks

We upgraded from a small tank to a wider one and I fully expected to be buying new lighting. The telescopic legs pulled out to span the new one and it sits just as steadily. Same lamp, second tank, nothing else needed.

Siobhan K.· Australia· 2 May 2026

Right plug for once

The last aquarium light I bought came with a two pin head and a travel adapter dangling behind the cabinet. This one has the correct three pin head fitted from the start. Small thing, but it is the reason I chose it.

Marcus O.· United States· 14 September 2025
Planted tank

Bright, and there is no dimmer

2300 lumens over a shallow tank is a lot, and I have ended up running it on a timer for shorter spells rather than turning it down. The rocker switch on the housing is handy, no scrabbling about at the socket. The colour is lovely, it just has one setting.

Lucy T.· Ireland· 21 February 2026

Legs are firm but a little narrow

It extends to about 95 cm as described, which covers my tank with a bit to spare. The feet themselves are slim, so on a rimless tank you want to seat them carefully. Been up since January without moving.

Farhan A.· Netherlands· 11 January 2026
Planted tank

Plants have taken off

The 8500 K tone reads as proper daylight instead of the yellow cast the old lamp gave everything. Greens look green and the reds on my fish are far stronger. Growth in the planted corner has picked up noticeably since spring.

Keith N.· Australia· 5 June 2026
Tropical community tank

Went for the 72 LED version

The tank is on the long side and I did not want dim patches at the ends, so I took the larger model. Coverage is even from one end to the other. The 12 V supply runs cool and the housing barely warms up after a full day on.

Zainab H.· United Kingdom· 24 August 2026

Fine light, legs rattle on my rim

No issue with brightness or colour, it does exactly what it says at 8500 K. My tank has a plastic rim with a ridge and the extended legs never quite sit flat, so the bar rocks if you knock the lid. It works, it just does not feel as solid as I had hoped.

Stuart C.· United Kingdom· 5 November 2025
Marine tank

Runs over the marine tank happily

Bought it for a small marine setup, which a lot of lighting at this sort of level is not rated for. It has been over salt water since October with no corrosion on the housing or the legs. The tone suits what is in there well enough for my purposes.

Imogen V.· United Kingdom· 8 October 2025
First aquarium

Switch is stiff to start with

Good light, and being able to flick it on at the housing rather than reaching under the cabinet is genuinely useful. The rocker took a firm press for the first fortnight before it loosened up. It has been fine ever since.

Jack E.· United Kingdom· 13 April 2026
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Good questions

Before you buy

The 36 LED suits smaller tanks and the 72 LED wider ones. Both share the same telescopic legs, so measure the outside width of the rim rather than the water line.

The supplier rates it for fresh and salt water. As with any aquarium lighting, keep the adapter above the tank and run a drip loop in the cable so condensation runs off before it reaches the plug.

There is a rocker switch on the housing but no dimmer or built in timer. If you want a photoperiod, put a plug timer on the adapter, which is cheaper than buying a controllable fixture.

Measure the outside width across the rim and check the extended span covers it. The 36 LED suits tanks to about 60 cm; the 72 LED covers wider tanks and gives more usable light in a deep one.

It is rated for both fresh and salt water. Salt creep is corrosive, so wipe the housing periodically and keep it above the splash zone.

There is no built in dimmer or timer, just a rocker switch. A plug in mains timer costs very little and is the single most useful addition, since a fixed photoperiod is what keeps algae down.

Last reviewed 30 August 2026

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