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Gear catalogue · 50 lights

Aquarium lights, compared properly

Planted-tank LEDs sized to your tank length, with power and spectrum. From ADA, Boyu, Chihiros, Dophin, Eheim, Juwel, Oase, SunSun, Twinstar, UNS. Match them to your tank, then put up to four side by side.

TL;DR, choosing aquarium lights

Buy a light for your tank length first and your plants second. Most aquarium LEDs are sold to fit a tank size (a 60 cm light for a 60 cm tank), and the fixture should be the same length or slightly shorter so the ends of the tank are not in shadow. How much light you need depends on your plants: anubias, ferns and crypts are happy in low light, while carpets and red stems want high light and, realistically, CO2 to go with it. RGB and WRGB lights make reds and greens pop and let you tune the colour, while plain white lights are cheaper and still grow plants well. App control and a built-in sunrise and sunset are worth having, because a steady 6 to 8 hour photoperiod is one of the best defences against algae.

How to choose

  • Match the light to your tank length. The light should be as long as the tank or a little shorter.
  • Low light for epiphytes and crypts, medium for most stem plants, high only with CO2 and good fertilising.
  • WRGB and RGB lights show off colours; white-only lights grow plants just as well for less money.
  • A timer or app with ramping makes a 6 to 8 hour photoperiod effortless.

Frequently asked questions

Straight answers to the questions people ask most when choosing aquarium lights.

What size light do I need for my aquarium?

One made for your tank length. Lights are sold to fit tank sizes, so a 60 cm tank takes a 60 cm light. Slightly shorter is fine, longer usually means buying legs or a hanging kit.

How much light do aquarium plants need?

Low-light plants like anubias and java fern are fine at about 15 to 30 PAR at the substrate. Most stem plants like 30 to 50. Carpets and red plants want 50 or more, and at that level you really need injected CO2 to avoid algae.

Is a WRGB light better for plants?

For growth, not dramatically. The extra red and blue channels mostly change how the tank looks, making reds richer and greens deeper. A good white LED grows plants well; WRGB is about presentation and control.

How many hours should aquarium lights be on?

Six to eight hours at full intensity is a good target for a planted tank. Start at six on a new tank and add time only once plants are growing and algae stays away.

Specs come from the maker or a major retailer’s listing and are checked where we can. Makers revise products, so confirm the figures on the product page before you buy. Product photos are supplied by the brands and their distributors.