Looking for the best LED grow light for weed? We’ve reviewed the most popular LED grow lights in 2018, so you can find the perfect light for your budget and setup.
A good LED grow light is essential if you want a good yield and potent buds.
However, choosing the right light is a total nightmare for most growers.
Every light has different power, prices and functionality, and grow light manufacturers are known to make insanely false claims about their lights to get more sales.
This article aims to cut through all the bullshit.
We’ll tell you exactly what you should be looking for in a good LED grow light, and which LED grow lights are the best value for money.
The Best LED Grow Lights 2018 – Quick Look
Here are best LED Lights in 2018, ranked according their cost, spectrum, PAR output, functionality, warranty and durability.
I’ll cover each grow light in more detail below.
This budget friendly LED grow light is powerful, efficient and outputs the perfect amount of PAR in the flowering stage.
In addition to this, Viparspectra offer generous 3 year warranty and reliable customer service. Read more about this light below.
As you can see from the table above, the Viparspectra 600w is an excellent choice if you’re planning on growing up to four plants.
The high PAR output on this light is really impressive and will allow your plant to really maximise it’s growing potential.
However, If you’re only planning to grow 1-2 plants, the Roleadro 300w is the light I would opt for.
It’s full spectrum ( including UV ) decent PAR output and low price are why this light is so popular among beginners.
LED Grow Light FAQ
In this section, I’ll answer a few of the most commonly asked questions about LED grow lights.
If you have any further questions, please let me know in the comments and I’ll answer them here 🙂
Q: What Are LED Grow Lights?
A: LED (Light Emitting Diode) Grow lights are a type of efficient grow light that are perfect for use indoors.
They offer some awesome benefits over traditional types of grow lights.
Q: What Are The Benefits of LED Grow Lights?
- Full spectrum, boosting growth and potency of plants
- They output low levels of heat, reducing ventilation costs
- The bulbs last a long time ( 50,000 – 100,000 hours ) so no need to replace bulbs
- Up to 50% more energy efficient than HPS/HID or Fluorescent grow lights
- Easy to use. Just plug in and turn on
- No need to buy extra equipment like ballasts or reflectors
- Safer to operate than HPS lights
Any downsides? The only real downside to LED grow lights is that they cost a bit more up front than HPS or Fluorescent lights.
However, your energy savings over time will more than make up for this.
Q: What Wattage LED Grow Light Do I Need?
A: You need at least 32 actual watts of power per square feet of grow space.
Actual watts are what your grow light draws from the wall socket.
It is not the total wattage of LED chips in the light that most manufacturers advertise in their product titles.
For example, the Viparspectra 600w in our comparison table above gets its 600w name because the light is made up of 120 5w LED diodes.
This is simply the maximum capacity of the diodes in the light.
It’s actual wattage is 269w – the power it draws from the wall socket.
One cannabis plant needs at least 1sq foot to grow in ( preferably a little bit more ) This will allow your plant room to grow to its full potential.
Therefore, if you were planning on growing 4 plants, you’d need a light with 128 actual watts.
Note: As well as actual watts, It’s also very important to know how much PAR your light outputs, because some led grow lights might have a high actual wattage and a low PAR output due to factors such as the angle of the lenses, efficiency etc etc – so keep an eye out for high PAR output!
Q: Will LED lights burn my plants?
A: While LED grow lights run much cooler than HPS lights ( see video above ), if you hang them too close to your plants, they will get light burn. A good way to avoid this is to place your hand over at the top of your plant. If you feel the heat of the light is too hot for your hand, then it’s too hot for your plants – move your light back a little.
Q: How far from my plants should my LED lights be?
A: This is not a simple question to answer, as it will vary between different grow lights. Most good manufacturers will provide instructions on the light hanging distance at various stages. However, you want to keep your light between 18 to 36 inches away from your plants. Roughly 18 inches above the canopy while flowering, while 24-36 inches above during the veg stage. Remember, if the light is too hot for your hand, it’s too hot for your plants. It’s always better for your lights to be too far away than too close.
What Makes A Good LED Grow Light?
Here are some important things that you should look for in a good LED grow light:
1. Full spectrum ( including IR and UV )
A full spectrum LED grow light will give your plant every wavelength of light it requires to maximise it’s growth ( bigger yields ). Most LED grow light manufacturers will provide details or charts about their lights spectral output. Look for blue lights between 430nm-450nm for the vegetation stage and red lights red lights between 640nm-680nm for the flowering stage.
You should also look for an LED grow light that includes UV ( ultraviolet ) and IR ( Infrared ) diodes.
Ultraviolet light has been shown make your plants react defensively and produce more trichomes. This leads to an increase in THC levels ( higher potency )
The benefits of Infrared are a little more debated, but many experts believe that it promotes larger leaf growth and increases yield size.
2. High PAR output
PAR ( measured in umol/2/s ) is the spectrum of light that your plants use for photosynthesis, so you want to feed them a lot of it. Most good manufacturers will provide you with a chart showing you how much PAR your plants will get at various heights. Between 200-400 umols is perfect for seedlings. Between 400-600 umols is perfect for late vegging cycles, and 700-900 umols is the perfect amount for flowering.
3. Daisy Chaining Functionality
A very useful feature if you need to buy multiple lights. This functionality allows you to plug one light into another light so that you only need one power chord. This makes it easier to hang your lights side-by-side, keeps your grow space organised and frees up socket space.
4. Veg & Bloom Switches
Veg & Bloom switches allow you to optimise the intensity of your lights for the different stages of your grow cycle. This prevents your young plants from getting light burn and saves you money on your electricity bill.
5. Good Warranty
Make sure you pick a grow light with a warranty of 2-3 years. LEDs should last for more than 10 years, but having a decent warranty will give you peace of mind that if anything goes wrong, you will get a replacement or refund
6. Responsive Customer Service
This is vital. If something goes wrong with you’re light, you want to have purchased from a company that will get back to you quickly and make things right. Check Amazon reviews to see how the manufacturer has replied to negative reviews.
8. High Actual Wattage
Many grow light manufactures name their grow lights after the total wattage of LED chips inside the light. For example, a grow light with 120 5w LED chips might be advertised as a 600w grow light. The actual power is the wattage that it draws from the socket. Keep an eye out for text like “consuming only 160 watts!” – this is the lights actual wattage.
The Best LED Grow Lights For Weed
Now, you may hear some people on forums saying that “cheap Chinese LEDs don’t work” but I couldn’t disagree more. Most people don’t have the funds to pay thousands of dollars for a fixture like a black dog led grow light. They want to grow 1-6 plants and get a good yield – the best lights listed in this article will do that and more.
Ok, let’s get started. The grow light reviews featured below fall into four main categories:
1. Best Value LED Grow Light
2. Best 1000w LED Grow Light
3. Best 600w LED Grow Light
4. Best 300w LED Grow Light
1.The Best Value LED Grow Lights For Weed
LED grow light technology has come a long way over the past 10 years. These advancements mean you can now pick up a really decent LED grow light for under $150. Out of all the grow lights I tested, these two lights offer the most bang for your buck.
# 1 – Viparspectra 600w LED Grow Light
The Viparpectra 600w takes top spot as the best value LED grow light. It’s actually my current favourite grow light – I own two of them! This grow light is extremely powerful for the price. With an actual wattage output of 269w providing 703 umols of PAR at 18″ This gThat’s the perfect PAR output for the flowering stage and not many similarly priced lights come close to matching this. Although this light doesn’t come with UV, it still has a full spectrum which includes Infrared. The V600 also comes with really useful functionality, such as the ability to daisy-chain (hang multiple lights together while using only one power cord ) and veg and bloom switches ( optimise your lights spectrum for the veg and bloom stage ). On top of this, Viparpectra are a very reliable company and they back this light with a very nice 3 year warranty. Read full review
Who is this light best for? This light is perfect if you plan on growing up to 4 plants. However, if you’re on a tight budget or plan on growing no more than 2 plants, you might want to considering purchasing the v300 below.
What size grow tent should I get? If you plan on growing 2 plants with this light, get a 2x2ft grow tent. If you plan on growing 4 plants under this light, get a 3x3ft grow tent.
# 2 – Roleadro GalaxyHydro 300w LED Grow Light
Roleadro’s Galaxy Hydro is another very popular 300w LED grow light, and it definitely gives the Viparspectra a run for its money. The Roleadro outputs slightly more PAR at 18″ ( 453 umols ) and and also comes with the ability to daisy chain and as well as a full spectrum which includes IR and UV. Again this light is perfect for 1-3 plants inside a small 2x3ft grow tent. Read full review
2. The Best 1000w LED Grow Lights For Weed
Choosing a 1000w LED grow light means that you’re looking to spend a bit more to really maximise your yields. The PAR output on a good 1000w LED grow light should be in the high end of the optimal ranges for veg ( 400-600 umols ) and flowering (700-900 umols )
# 1 – Phlizon 1500w LED Grow Light
The Phlizon 1500w led grow light is extremely powerful and has an actual wattage of 1000w, while consuming 340watts . The PAR Output on this bad boy is a massive 812 umols at 18″ , which means that it’s right in the middle of the 700-900 optimal range for flowering. The high PAR output, combined with the full spectrum, including UV and IR wavelengths, will mean your plants have everything they need to really max out their potential yield. The lack of functionality such daisy chaining and veg and bloom switches means that this grow light is available at a very tempting price for growers looking for power over functionality.
# 2 – Bestva DC Series 2000w LED Grow Light
The Bestva DC series 2000w is another exceptionally high powered grow light. With an actual wattage of 1400w this light will output roughly 760 umols at 18″ – well within the optimal PAR ranges for flowering. Again, focusing on power, Bestva have stripped out the nice-to-have features such as daisy chaining and veg & bloom switches. This makes the light very affordable. This light also comes with a 3 year warranty to give you peace of mind.
3. The Best 600w LED Grow Lights For Weed
A good 600w LED grow light will be able to take between 1- 6 cannabis plants from seedling ( or clone ) right the way through to harvest, producing an excellent yield. In my opinion, 600w of actual wattage is the perfect power for an indoor LED grow light. It’s powerful enough to output optimal PAR values, while consuming less electricity than more powerful lights.
The Viparspectra 600w is hands down the best 600w grow light overall. I’ve covered this light briefly above under the “best value led grow light” award, so I won’t repeat myself here. You can read my full review of the Viparspectra 600w here
# 2 – Phlizon 600w LED Grow Light
The Phlizon 600w is also a great option if your budget can’t stretch to the Viparspectra. It offers a full spectrum ( including UV and IR ) as well as daisy chain functionality, veg and bloom switches. It outputs slightly less power than the Viparspectra, and therefore produces less PAR at 18″ , but it’s still enough to get a very solid yield. Using less power means using less electricity, so if funds are tight, then this is a great backup choice. Phlizon stand by this light with a 2 year warranty and responsive customer service. Read full review
4. The Best 300w LED Grow Lights For Weed
A 300w LED Grow light is perfect if you’re looking to grow one or two plants. Although these grow lights not might not penetrate your plants as well as more powerful lights, they will still do a great job and provide a good yield. Due to their value, many growers opt to purchase two 300w lights and hang them side by side to cover a larger area.
300w LED Grow Light
300w LED Grow Light
300w LED Grow Light
300w LED Grow Light
300w LED Grow Light
300w LED Grow Light
My top pick in this category is the Roleadro 300w. I covered this light above under the “Best Value LED Grow Light” award – so check that out if you missed it 🙂 If you want to read more you can check out my full review on this grow light, here Read full review
# 2 – Viparspectra 300w LED Grow Light
The Viparspectra 300w is the little brother to Viparspectra’s excellent 600w light. At half the actual wattage, Viparspectra offers this grow light at a significantly lower price point, which makes it very appealing if you’re a little tight on cash. Outputting 427 umols at 18″ , this light will produce great results for between 1 to 3 plants inside a 2×3 mylar lined grow tent. It comes with daisy chain functionality, a well balanced spectrum ( IR but no UV ) and is backed by Viparspectras generous 3 year warranty. Read full review
Who is this light best for? This light is only really powerful enough to take 2 plants from seed to harvest, so choose this light if you’re planning a small, personal grow.
What size grow tent should I get? Best used in a small 2ft x 2ft mylar lined grow tent to really maximise PAR.
I hope you found this best LED grow lights article useful!
All of the LED grow lights reviewed in this article will do a solid job for your plants.
They’re all reasonably priced and produced by reliable manufacturers who offer good warranties and customer service.
That said, the Viparspectra 600w stands out due to it’s nice mix of high PAR output and useful functionality. As mentioned earlier in the review, I own two V600’s and they do an excellent job hung over 6 plants in a 3×3 grow tent. If you’re looking for a reliable light that produces great yields and won’t break the bank, you really can’t go wrong with this light.
Last update on 2018-11-01 / Affiliate links / Images from Amazon Product Advertising API