Blogs

When it comes to setting up a planted aquarium on a budget, many will assume lighting will be the next most significant place to scrimp – and where the most confusion about plant care will arise. In many of the Reddit forum threads where people debate aquariums, lighting, and how best to equip them, the question you see repeated again and again is: what is the best cheap aquarium light that can still grow healthy plants? Here, the answer is quite simple; you really don’t need fancy lights to have a functioning planted tank. 

But if you are going to take this approach to aquarium setup, you must be clued up on what this actually means regarding tank capacity, intensity, and plants. 

In this guide, Seaoura is going to break down which lights deliver what they claim and which lights to stay clear of, giving you the best in budget aquarium lights to prevent a slow and agonising death to your beloved plants.

Source: "This Cheap Aquarium Light Will Transform Any Beginners Planted Tank! (Seaoura SR-616 Review)", Glass Box Diaries, https://www.youtube.com/watch?v=45GLLpJN69s

Do Cheap Aquarium Lights Actually Work for Plants?

Yeah, though it depends.

It’s a complicated yes, but there are some restrictions. If the cheap aquarium lights you are using (such as many entry-level LED bar lights and “Amazon no-name brand” lights) will sustain planted life, they certainly have their boundaries.

Overall, a cheap light will get you by when doing planted tanks, which could arguably be classified as “low-tech”. If all of the criteria listed below match, then there is generally not going to be a major problem.

• You are using plants which are described as “low-light” or “low-medium light plants”
• Your tank doesn’t have a lot of vertical height to it, ideally under about 40 – 45cm (or less than 18 inches)
• You are not providing additional CO2 in the tank
• You are not trying to grow plants that grow extremely fast, or that you’d typically see in competition-level aquascaping

If your plan involves high-light requirements, such as plants described as “carpet” or certain “red” plants, even giving them a 12-hour photo period will still not be able to “make up” for their low lighting output.

What Makes a “Good Budget Aquarium Light”?

So, when looking for a cheap aquarium light, price often takes priority over other factors. However, these are the three most important factors to consider that actually outrank expense:

The best affordable LED lights will offer you:

• Sufficient PAR to maintain plant health
• A full light spectrum (avoid any lights that are ONLY white or blue ornamental ones)
• Even spread of light within your tank

Many of the cheapest lights aren't actually cheap because they have bad-quality LEDs, but just because they provide the wrong type of light for photosynthetic processes or are too weak to penetrate deeper tanks properly.

However, for many, simply using a full-spectrum LED plant light will suffice. You do not necessarily require one of the top high-quality controllability lighting systems unless you are aiming to speed up growth or have the brightest coloration.

Cheap vs Expensive Aquarium Lighting: What’s the Real Difference?

The biggest difference is not whether plants grow or not—it’s control and consistency.

For most beginner aquariums, expensive lighting is not necessary. The improvement is real, but not always visible unless you are also controlling CO2, fertilization, and tank stability.

Best Setup for a Budget Planted Aquarium

The thing about planted tanks on Reddit where cheap light is used is that most users completely fail to acknowledge anything around the light system. When they throw it together, they get tons of algae that “can’t be explained from such low lighting,” not understanding how a relatively balanced system creates stability.

A good, cheap planted tank uses:

• Moderate intensity lighting, not maximum
• Easy plants that can use varied light conditions: Anubis, Javafern, crypts, etc.
  Consistent 6-8 hour photoperiod
• Basic fertilization strategy
• As few algae triggers as possible (especially feeding to excess and too much lighting)

This setup requires less light than one designed without this consideration, as a well-established ecosystem will do a large part of the work of keeping unwanted guests out, especially algae, which is usually what is blamed on the light.

Common Mistakes When Choosing Cheap Aquarium Lights

In Many ways, they do (but unfortunately do not understand where that is the bad type). Beginners frequently think, The bigger it becomes, the brighter, The greater is good… until you discover that your plants are not healthy whatsoever. How about you find your very, very common mistakes below. 

Most common beginner mistakes:

• Buying light based on the rating, wattage, or value
• To run your lights longer to make up for the power loss
• To purchase LED strips for non-aquarium lighting that lacks a suitable spectrum
• Do not consider the profundity of the aquarium and the plants' light needs

The suitable option would be that the light intensity needs to accommodate the species of plants, rather than attempting to increase intensity with a cheap lamp through extended periods.

What Type of Cheap Aquarium Light Should You Buy?

For beginner planted tanks, this is most of the time the safest bet:

Budget full-spectrum LED light specifically built for planted freshwater tanks.

If you're on a budget, don't buy a strip with super common RGB LED diodes in it unless you have learned to work with the spectrum. They may seem bright, but most of the plant's beneficial light spectrums simply are not broadcast well.

A cheap light just for basic plant growth, which would a basic planted tankled be just what I would recommend for a basic planted tank.

Final Thoughts

Cheap aquarium lights can be really great-if they're put in the right situation. When starting an aquarium that contains plants, there's no point in chasing ultra-high intensities and purchasing expensive setups and fixtures. It really comes down to maintaining balance. 

There's only so much plant food the ecosystem can support, after all. Some very affordable alternatives can allow you to be able to sustain a healthy aquarium system with plants.

FAQ about Best Affordable Aquarium Lights

Q1: What kind of aquarium plants can grow in cheap aquarium lights?

A1: Most low to medium-light plants can be grown. For demanding plants, you may need to spend a bit more money.

Q2: Will my CO use change with cheap aquarium lighting?

A2: If your setup is on the lower-tech side, moderate lighting will work without supplemental CO2.

Q3: How much time of day should I be running my lights?

A3: I'd say aim for 6 to 8 hours a day if possible, to minimize algae problems.

Q4: What is the biggest concern about cheap aquarium lights?

A4: Not the intensity of them, but the quality of the spectrum or the light coverage of the tank.