T5 LED Grow Lights: Which Ones Beat Fluorescent Tube Bulbs?

Why switch to T5 LED grow lights?

Especially when T5 fluorescent lights are so great for seeding, cloning and vegging.

Well, that’s true, but the LED equivalents are even better.

They do everything the fluorescents do: same output and spectra (often even better) and flexibility.

But they do it while using half the power or less, emitting less heat and lasting much longer. Not having to change bulbs as often and paying for half as much electricity saves you a ton of money.

Yes, the LED T5 lights do cost a bit more, but you quickly make that money back in cost savings.

So what’s the catch?

Same as always with LED grow lights. The market is flooded with low quality brands that don’t deliver. Or they do deliver for a short time, then they break.

That’s why I decided to write this article.

I did all the research and found the best T5 LED grow light tubes and bars on the market, so that you don’t have to. Whether you are looking for a LED tube to replace a fluorescent tube in an existing fixture, a standalone T5 tube, or a complete kit with fixture and bulbs, I narrowed the options down to the best.

And that doesn’t mean the most expensive. These are the ones that give you the most value for money.

 

Summary of Recommendations

Here’s a quick summary of my findings. If you’re curious why I chose these lights, you’ll find brief reviews for each below.

 

What Are T5 LED Grow Lights?

There are two types:

1. T5 equivalent LED lights
2. T5 LED direct replacement tubes

The first are LED grow lights that perfectly replace a T5 fluorescent light. They come with a fixture and are thus standalone lights.

The second are light tubes. They require a fixture to work, but they can use any standard T5 fluorescent fixture you may have. There is no need to buy a new fixture, if you already have one.

The big advantage of these tubes is that you can use any T5 fixture, but make it much more efficient (see next section), simply by using LED tubes instead of fluorescent tubes.

Note: If you want to use these tubes, but do not already have a light fixture, the Active Grow bundle reviewed below is the best choice. But it only works with T5 LEDs. If you also plan to use regular T5 fluorescent tubes, then the Agrobrite fixtures are the best value on the market. You can read all about them here.

 

Why Are T5 LED Lights Better Than Fluorescent Bulbs?

LED tubes have three big advantages over their fluorescent counterparts:

• They use half the power, saving you money
• They last longer, saving you money and the hassle of having to change bulbs more often
• They emit less heat (only an issue if you have a lot of them)

They do have a big disadvantage, too. They cost much more than the equivalent T5 tubes.

That said, you will quickly make back that cost difference thanks to the lower power costs and the longer lifetime. You won’t have to get new bulbs for many years.

 

The Best T5 LED Grow Bulbs: Brief Reviews

These are the best T5 LED grow lights on the market. I’ll start with the best direct replacement tubes (the ones you can use in and standard T5 fixture) and then move on to the standalone lights (fixture included).

 

Best T5 LED Direct Replacement Tube: Active Grow T5 High Output 4FT LED Tubes

There are a few brands on the market that make good LED tubes, but the Active Grow High Output tubes are our favorite, because they work with the ballast in most fixtures.

What this means is that you can simply replace the fluorescent bulbs with these bulbs and you’re good to go. With most competing lights, you need to rewire the fixture to disconnect the ballast. It’s not overly difficult, but not having to do it at all is even easier.

The downside as that these bulbs are not compatible with every possible ballast. Most notably, they do not work with any single-bulb fixtures. Apart from that, they will work with most big brands.

That includes the Hydrofarm Agrobrite line, which is our favorite. Active grow also sells their own fixtures, which are excellent, too. See below for our brief review of the fixture (comes with bulbs).

You can check this list to see if your ballast is compatible. If you’re not sure what ballast is in your fixture, check the instruction manual, the manufacturer’s website, or open the fixture and take a look at the ballast itself. The ballast is the relatively large, rectangular thing. They all look fairly similar. There is an example to the right.

The Active Grow High Output T5 LED bulbs only use 24 watts each, which means a minimum 45% reduction in energy costs over fluorescent bulbs. Despite using only half the electricity, the output is virtually the same. But because they are specifically designed for horticultural use, the Active Grow bulbs have a higher PPF of 55 μmol/sec.

The tailored spectrum also has a very high CRI of 95. That means the light is very similar to natural sunlight (which has a CRI of 100) and is much closer than the average fluorescent bulb.

The color temperature is 4000K, which is great for all stages of plant growth, but especially good for vegging. The spectrum contains lots of blue light, but also a good amount of red, which plants need during any stage. The red and far-red wavelengths increase the rate of photosynthesis, which speeds up plant growth by up to 20%.

The tubes are rated for 30,000 hours of use (far more than any fluorescent tube) and they come with a 1-year warranty. 30,000 is the minimum, so they will likely last longer. Active Grow is located in Seattle Washington, so on the off-chance that something does go wrong, you won’t have to deal with a Chinese brand (and all the hassle that entails). I give them a Grow Light Info rating of 4.8 out of 5.

The following video compares these LED tubes to standard fluorescent tubes:

Pros

• Replaces a standard 4ft T5 fluorescent tube
• High output of 55 μmol/sec
• Great spectrum for plants speeds up growth by up to 20%
• 24 watts means a 45% reduction in power costs
• 30,000 minimum lifespan means no bulb changes for years

Cons

• Not compatible with all ballasts (see list)
• Only available in 4ft length (not 2 ft)

 

Best Budget T5 LED Grow Bulb: HTM Lighting 4ft 22W T5 High Output LED Tube

These 4 Foot T5 High Outbut LED Light Tubes from HTM Lighting cost far less than the previous ones above, but they have two major disadvantages. First, they are not specifically designed for horticultural use and second, you need to rewire your fixture to bypass the ballast.

The first simply means that the spectrum is that of a regular fluorescent bulb, which can work just fine for growing plants. The more tailored spectrum of the bulbs reviewed above is better, however. You will see faster growth with those.

The second issue could be a problem. To be honest, rewiring a fixture to bypass the ballast is fairly simple, if you just follow the included instructions, but it could pose a problem for people who struggle with such things.

Click the photo of the bulbs (or the button below) to head to Amazon, where you can find a picture of the rewiring instructions to see if you think it’s something you can do. If not, pay a bit more and get the Active Grow bulbs.

These bulbs use only 22 watts (as opposed to 54w for the fluorescent equivalent), so you’ll immediately see a 60% reduction in your power bill after switching. The listed life expectancy of these bulbs is 50,000 hours, though they will deteriorate and become less bright, so you’ll probably want to switch them out before that. I’d count on 30,000 to 40,000 hours of good use.

These bulbs have a CRI of 83. The Active Grwo bulbs above have a CRI of 95. 100 is equal to sunlight, so you can see that those bulbs are much closer to natural sunlight, which is better for plants. These bulbs have a color temperature of 5000K, which is a bit cooler than sunlight (contains more blue).

They are designed to replace a standard fluorescent bulb, not a grow bulb. They still work well, but not as well as a dedicated grow light. They are UL listed to meet residential, commercial, and industrial safety requirements.

Pros

• Low cost
• Work in any T5 fluorescent fixture
• Low power usage of 22 watts
• High output of 2800 lumen

Cons

• Spectrum not designed specifically for plants (but works, just like a fluorescent tube)
• You’ll need to rewire your existing fixture to bypass the ballast (instructions provided and also available as a photo on Amazon—click the button below)

 

Best Standalone T5 LED Light Bar: Barrina LED T5 Integrated Single Fixture

The 4 Foot Barrina Integrated Light Bar includes both the bulb and the fixture. You don’t need to get anything else, making these lights the easiest way to add T5 LED to your grow, if you do not already have a T5 fixture.

These bars are designed to replace a standard 6500K fluorescent tube. They are not specifically designed for horticultural use. The 6500K spectrum contains a lot of blue light and not much red, but it is still full spectrum light.

It works well for cloning and seeding, as well as vegetative growth. It will not be very effective for flowering. Another great use of this light is to supplement a red-heavy grow light, like an HPS light. Adding blue-heavy light like this to your grow, especially from below, will really boost plant growth and yields as well.

These bars use only 20 watts, so you’ll see a large reduction in power costs over fluorescent bulbs (which use 54 watts). Despite using so much less power, they give you a similar output (2200 lumen, to be exact).

A great feature of these T5 LED bars is that you can connect up to 8 of them together. You can plug the fixtures directly into each other and connect them end-to-end, or you can use the included cords to plug them into each other that way.

The fixtures come with snap clips that make it easy to hang them anywhere. They are covered by a 3-year warranty, which is much longer than most competing fixtures, which generally have a maximum 1 year warranty.

Pros

• Versatile: you can use them above, below, horizontally, vertically, etc.
• Low power usage (22 watts)
• Can connect up to 8 lights together
• 3-year warranty
• Very low cost

Cons

• Spectrum contains far more blue than red light, so won’t work as well for flowering
• No reflector, so light spreads out in 270 degree angle

 

Best T5 LED Fixture With Bulbs: Active Grow T5 LED Grow Light Fixture

If you want to use T5 LED lights, but don’t already have a fixture, I highly recommend the Active Grow T5 LED Fixture. It is designed specifically for LED bulbs, so there is no need to worry about rewiring to bypass the ballast or about ballast compatibility.

It also includes 4 bulbs, which really cuts down on costs. You have your choice of Active Grow’s amazing sun-white spectrum bulbs (reviewed above and my #1 choice for LED bulbs) or their red bloom spectrum bulbs.

The red bloom spectrum contains blue light and tons of red and far red. Virtually all green and yellow light is omitted. This spectrum boosts chlorophyll light absorption and is great for flowers, fruits, germination and cloning. The combination of red and far red wavelengths (660 nm and 730 nm) creates the Emerson Effect (i.e. a higher rate of photosynthesis), which speeds up plant growth by up to 20%.

The red bloom spectrum bulbs are great when used in combination with the regular white bulbs. Used on their own, they are not as effective as they are when supplementing the natural sunlight spectrum of Active Grow’s all-white tubes.

This light fixture will cover a 2 by 4 foot area. It has dual power switches, so you can run two bulbs only, or all 4 at once. This allows you to save electricity (and thus money) when you don’t need all 4 bulbs. You can connect up to 4 of these fixtures on one 120 V circuit. The fixture has a limited 3-year warranty.

Pros

• Includes 4 LED bulbs (your choice of sun-white or red bloom spectrum)
• Bulbs use half the power of fluorescent and last much longer
• Can connect up to 4 fixtures on one circuit
• Fixture is designed for LED bulbs, so no need to worry about ballast compatibility or rewiring anything
• 3 year warranty

Cons

• Higher price than comparable fluorescent fixture (but will pay for itself in cost savings)

 

Photo Credit

Ballast photo by Dennis Brown – Own work, CC BY-SA 3.0, Link