Are LED Lights Good for Fish?

led lights for fish

The lighting you will use on your aquarium has a massive effect on the life underneath it and the fishies swimming there. A well-maintained and healthy aquarium has a healthy and happy fish. While LED lights for aquariums are gaining more popularity due to the tons of advantages they offer, it’s vital to know whether this light source is appropriate for your fishies or not.

We’ll take a closer look at why light-emitting diodes are a top choice for every aquarist, its benefits and potential setbacks, and why your fish may prefer them over fluorescents and other lighting options.

Is LED Lighting Good For Your Aquarium?

With so many light variations available in the market today, you might be one of the many who have switched to LED lighting for their aquariums or contemplating whether they’re suitable for your fish and plants.

LED lights are indeed okay for fish. They are suitable for plants living in your freshwater aquarium, and your lighting must be switched on for about 8-12 hours every day. Popular LED lights like AI Hydra 26 is one of the top recommendations when searching for a lighting system for your tanks. You need to consider some elements to ensure you get the best deals with LED lights, including facts about this widely-used lighting system.

LED lights are better than an incandescent lamp or other kids of light for aquariums. Here’s a complete rundown of the benefits you can get with them:

  • LED lights are affordable. Either for aquarium lighting or other applications, they are gaining popularity because of their cost-efficient nature. There are tons of great deals you can get with LED lights for aquariums.
  • LED lights offer a magnificent color spectrum. You can choose various colors, but white and blue are the most popular for aquarists as you can switch them for daytime or nighttime usage.
  • If you want to nurture freshwater plants in your aquarium, you’ll need to invest with full-spectrum lights to guarantee success. Full-spectrum LED lights are not expensive.
  • Plants need a full spectrum. If you plan to nurture fish alone, the full range can be set aside and go for white lights.
  • When it comes to cost-efficient lighting, LED lights are the best choice. It won’t add much to your electric bill, which makes them a great choice.
  • LED lights don’t emit heat into your aquariums. Fluctuations of water temperature can stress fish and compromise their health.
  • LED lights are more durable compared to incandescent lights and will last longer, even with simultaneous usage.

Facts About LED Lights and Fish

Although fish doesn’t care what type of light you use, the heat and brightness generate matters. If you notice your fish are freezing or hiding when you open the morning, then you might want to reconsider changing the brightness level. Otherwise, adding new plants into the aquarium adds protection for your fishies too.

When it comes to LED light color, try to replicate the sunlight into the tank. Also, fishes will appreciate it if you’ll provide some darkness at some time of the day. While some hobbyists leave the blue light overnight, it is not that healthy and may stress your fish in the long run, making your fish sick.

Blue light is not harmful to your fish. Just provide some darkness in your fish’s life, and you’ll do good for them.

If you are torn between white or blue light, then go for an LED light that offers actinic illumination of about 10k kelvins and a blue and white spectrum. It’s best for freshwater plants, marine corals, and fishes.


  • Lower energy consumption
  • Minimal heat output
  • Durable
  • Adjustable light source
  • Multiple color options
  • Broader light coverage


  • LED light availability
  • LED lights are also used for aquariums with plants.
  • Some LED fixtures may be costly.


LED illumination is suitable for marine life living in your aquariums. Aside from your fish, they are also ideal for nurturing plants in your tanks. It also improves the aesthetic appearance of your aquariums.

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