• Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar
  • Skip to footer

Grow Light Info

Helping You Choose the Right Grow Light

  • Grow Light Reviews
    • Blurple LEDs
      • Advanced Platinum Series Review
      • BestVA DC Series Review
      • Higrow LED Review
      • King Plus 1000 Review
      • Viparspectra PAR Series Review
      • Viparspectra Reflector 600 Review
    • COB LEDs
      • Aglex COB LED Review
      • CREE CXB3590 COB Review
      • Phlizon COB Series Review
    • Quantum LEDs
      • HLG Quantum Board Review
      • Kingbrite Review
      • Mars TS & SP Series Review
      • Maxsisun PB Series Review
      • Meijiu Review
      • Spider Farmer SF Review
    • Fluorescent Lights
      • Hydrofarm AgroBrite T5 Review
  • Buying Guides
    • HID Guides
      • Best CHM Grow Lights
      • Best HID Grow Light Kits
      • Best HPS Brands
      • Best MH and HPS Bulbs
    • LED Guides
      • Best LED Grow Lights
      • Best COB LED Grow Lights
      • Best Full Spectrum LEDs
      • Best 2000w LED Lights
      • Best Dimmable LEDs
      • Best T5 LED Lights
      • Best LEDs For Flowering
      • Best 300w LED Lights
      • Best LEDs Under $100
      • Best UFO LEDs
      • Best Blue LEDs
      • Best LED Grow Light Strips
    • Other Guides
      • Best Large Grow Tents
      • Best Small Grow Tents
      • Best Fan For Grow Tents
      • Best Grow Light Stands
      • Best Small Grow Lights
      • Best T5 Bulbs For Veg
      • Best Trichome Microscope
      • Best Digital Weed Scale
      • Best Weed Trimming Scissors
      • Best Grow Light Timer
  • Grow Light Advice
  • Cannabis Cultivation
    • Best Place To Buy Marijuana Seeds
    • Best Way To Grow Weed Indoors
    • What Do I Need To Grow Weed?
    • Growing Tips & Advice
You are here: Home / Buying Guides

LED Lights For Flowering Stage: Best Bloom Fixtures For Monster Yields

Last updated October 4, 2021 By Steven 16 Comments

high yielding led lights for floweringFor the longest time, LED lights had trouble flowering plants.

No longer.

Now, nothing beats the top LED lights for flowering. They have the perfect spectrum and get deep canopy penetration.

But that’s only the best. The rest are far less effective.

That’s why you need to make sure you get one of the few LED bloom grow lights that are actually up to the task.

And ideally, ones that don’t cost thousands of dollars.

I’ll show you exactly which fixtures give you the best yields below.

I will also show you the best all-red supplemental LED grow lights, in case you already have primary lighting and are simply looking for a bloom booster to really ramp up your yields.

 

LED Lights For Flowering Stage: Summary Of Recommendations

But before we get to everything else: a quick summary of the top lights. I’ll explain why I recommend each one in more detail below.

Best LED For Flowering Stage Overall

Phlizon COB 3000: easily the best value for money

 

Best LED Bloom Grow Light For Maximum Yields

Optic 8: largest yields, but very expensive; the Phlizon gives you much more value for money

 

Best Flower Booster LED

G8LED 90 Watt Flower Booster UFO

 

Highest Yielding LED Grow Light

The LED grow lights that result in the largest yields are generally those than contain every wavelength in the visible spectrum plus UV and IR light.

But they provide larger amounts of red light than other colors, with blue also being prominent.

There are a number of lights that provide this spectrum, but those that include COB LEDs get the highest yields on average.

The powerful chip on board LEDs get a much deeper canopy penetration than regular diodes. This leads to larger buds further down on the plants.

The most powerful light with that spectrum is the Optic 8+. It is expensive, but if you can afford it, that’s the light to get for the highest yields.

Optic 8 LED Grow Light

Another light from Optic LED, the Optic 6, also gives you a large output, but since the fixture is much smaller, you end up with more intensity in the center of the coverage area and less around the outside of the area.

Larger fixtures, like the Optic 8, simply achieve a more even light distribution than smaller ones.

Personally, I would not recommend the Optic 6 (or the Optic 4 or 2).

That’s because Phlizon lights exist.

You’ll find an in-depth review of them here.

Phlizon COB 3000w

The 3000 watt version (it is not actually 3000 watts—more on that in the review) is their most powerful light. It is virtually identical to the Optic 6 (in terms of specs), but costs far less.

The drastically lower cost for basically the same light, is why I recommend this fixture over all others.

The Optic 8+ is better if you can afford it, but the Phlizon gives you far better value for money.

I’m not going to go into any detail on the Phlizon light here, since I have already covered their lights in great detail in my review and also in my posts of the best COB LED and the best 2000w LED.

 

All Red LED Grow Light

Some people will tell you that a red spectrum LED grow light is ideal for flowering, but this is completely false. Flowering plants want light in all colors.

What IS true is that they want more red light than anything else. For that reason, many growers look to supplement their existing lighting with an all-red LED grow light during the bloom stage. These red spectrum lights function as a flower booster LED to increase both yield quantity and quality.

The main options when looking at supplemental lighting are UFO LEDs (round lights), LED light bulbs (that screw into a regular light socket) and small LED panels. We’ll take a look at the best of each type.

 

UFO Style Red-Spectrum LED Grow Light

G8 red-spectrum bloom booster LED grow lightUFO lights can actually be powerful enough to light a small grow on their own, but not ones with all-red light. Those are specifically designed to supplement existing (usually all-white) light, to give plants additional red light during bloom to boost yields.

The G8LED 90 watt red flower booster LED grow light is easily the best option. It features red diodes in two wavelengths: 660 nm and 630 nm.

Used as supplemental lighting, it will cover an area of around 8 to 10 square feet. When hanging 12 inches from the canopy, it delivers an output of 770 μmol/m²/s. It achieves this output while only consuming 80 watts.

The only real drawback of the G8 UFO is the price. It costs considerably more than most other UFO lights, but it is also much better made. It is one of the best UFO LED grow lights on the market.

That said, if you are looking for a good budget alternative, check out the 300w Growstar. It is slightly less powerful and only has 660 nm diodes, but it still delivers a ton of red light for a great flowering boost. And it costs a good bit less.

Check Current Price On Amazon

 

660 nm Red LED Grow Light Bulb

660 nm deep red led grow light bulbLED bubs are small LED fixtures that screw into any standard light socket. This makes them extremely versatile and flexible, but it also limits their potential size and power.

They only feature a small number of diodes and those diodes are usually all the same color or two different colors. Generally, they are either all red, all blue, or a mix of those two colors.

Due to their limited size and power, they are only suited as supplemental lights. For a flowering boost, we naturally want all red light. The flowering LED grow light bulb from ABI delivers this.

It actually comes in 4 versions. There is a 26 watt version with all 630 nm diodes, a 25 watt version with all 660 nm diodes and two 12 watt versions: one with 660 nm and one with 630 nm. 630 nm is red light, while 660 nm is a deep red led grow light.

These bulbs fit a standard household E26 socket. The come with a 3 year warranty and are rated for 50,000 hours of use.

Check Current Price On Amazon

 

Red LED Grow Light Panel

HQRP Red LED Plant Light PanelDepending on your setup, a round LED or an LED bulb may not work as well as a panel. IT is harder to find panel style supplemental lights, since most panel lights are designed to be primary light sources. There are a few good all res LED grow light panels, though.

The best among them is the HQRP 225 Red 14 Watt LED Plant Light Panel. It features 225 low wattage LEDs with a red light spectrum (the wavelength is 630 nm). All 225 diodes are powered by a mere 14 watts, which means a very low power consumption.

It also means the output is nowhere near powerful enough to be used as a primary light source, but it makes for excellent supplemental lighting during the flowering stage to give yields a boost.

This is especially true if you use several of these panels. A great configuration is to put them on the walls, with a panel or two on each side, to really envelop your plants in a yield-boosting red glow.

Check Current Price On Amazon

 

Do LED Lights Take Longer To Flower?

You may have heard that one big drawback of LED grow lights is flowering time. They simply take longer to flower.

While that used to be true, it no longer is. At least not for the best flowering LED grow lights.

The majority of LED lights will take longer. That is still true. They often don’t have enough power to bloom, or they simply have an ineffective spectrum. The reason HPS bulbs flower so well is a light spectrum that is heavy in red. It is great for flowering.

But it is not ideal. Adding blue light to that spectrum would improve it and lead to better results.

The LED grow lights I recommended above have the ideal spectrum. It is close to sunlight, but with additional peaks on read and blue.

The result is faster flowering times and better yields, both in terms of quality and quantity.

In short: while most LEDs are still pretty useless, the best LED grow lights are now also the best flowering lights on the market. Some do still have less canopy penetration, but if you remove the lower branches of the cannabis plant, that won’t matter much anyway.

Share this:

  • Click to share on Facebook (Opens in new window)
  • Click to share on Pinterest (Opens in new window)
  • Click to share on Twitter (Opens in new window)
  • Click to share on Reddit (Opens in new window)

Reader Interactions

Comments

  1. Lanny says

    October 29, 2019 at 05:32

    I have the Phlizon 3000w Cree Cob light.
    Would adding red spectrum supplemental lighting with the Phlizon during flower stage increase yields?
    Or does the Phlizon already have enough of the red spectrum?

    Also on the flip side, I have a large blurple led light and was wondering if adding cool and warm white supplemental led to this during flower would increase its potential for better yields?

    Thank you,
    Lanny J.

    Reply
    • Steven says

      October 30, 2019 at 02:39

      I don’t think there is much need to add red light to the Phlizon. I doubt it would make enough of a difference to be worth it.

      Adding white light to a blurple spectrum, on the other hand, should definitely help.

      Reply
  2. Kaiya says

    September 16, 2020 at 16:19

    Question…I have a led light with a veg switch and a flower switch.veg is white and blue and flower is all red. Should I leave both switches on during flower or just the red? Thanks

    Reply
    • Steven says

      September 17, 2020 at 01:59

      Leave them both on.

      Reply
      • Kaiya says

        September 17, 2020 at 15:17

        Thanks

        Reply
  3. Alex says

    November 5, 2020 at 15:11

    I have both switches on my light , can I used both and there is option for all red, what do you suggest ? I have just been using the blue/yellow and white also what exactly is the red light used for ?

    Reply
    • Steven says

      November 5, 2020 at 15:40

      Use all on for bloom. Plants use red light for photosynthesis, and need a lot of it during the flowering stage especially.

      Reply
      • Alex says

        November 5, 2020 at 17:05

        Okay so it’s okay if my my plant has all colors of lights on ?

        Reply
  4. Jacob says

    November 20, 2020 at 08:02

    Hi there Steven,
    I bought a Mars Hydro TSW 2000 LED for the combined veg and flower stages as a starter light. While I got a decent yield the first time, I found that its not yet producing the chunkiest buds as desired. Is this model considered good quality compared to what’s generally available on the market at large, and do you personally consider it good quality? Its possible there might be another factor at play here, but I’m quite meticulous about the growing environment.

    My second question is this: regardless of energy costs, what would produce better results, a full-spectrum LED for both stages or a combination of blue metal halide for veg and hps for flowering?

    Cheers,

    Jacob

    Reply
    • Steven says

      November 20, 2020 at 09:09

      How much area is that light covering?

      Reply
      • Jacob says

        November 20, 2020 at 11:44

        Its only a 3ft by 3ft tent, a little more than 6ft tall.

        Reply
  5. Cory says

    November 21, 2020 at 06:56

    Thanks for your article! I sure learned a lot and I’ve started researching more on this subject. I recently ditched the tents and gutted out a room that’s about 9’x7’. I know enough to be aware that I need more lights for a room that size. I have 2 spider farmer 2000 and I also added my tent lights which are 1500 watt phlizon, 2 of them. I plan getting all spider. I think I read in your article that HPS lights do so well in flowering because they are heavy on the red light. So what popped into my head with all my leds was adding more red for flowering. Would it benefit the plants to add additional red spectrum lights during the flowering stage?

    Reply
    • Steven says

      November 22, 2020 at 01:25

      Yeah, it could help. But Spider Farmer lights already have a good amount of red, so it’s not really necessary. I probably wouldn’t bother, (assuming you have enough light already), but if you have the money to spend, it won’t hurt to giver it a try. Maybe add some red to a single plant only nd see what difference it makes.

      Reply
  6. Jessie says

    February 26, 2021 at 12:50

    I grew a strain, which I thought was called cherry pie. My first time growing anything like that. People said the soil, lighting, the weather play a factor in it to grow well. Grew it outside in some potting soil I had, and OMG! freaking gorgeous. So my question is, can I bring them inside into a grow tent with all I need to do for them to flower. Thanks 😊

    Reply
    • Jacob says

      February 27, 2021 at 06:20

      You could, but you run the risk of an infestation of bugs. My buddy did the same thing and he had no problems for a week until he woke up one morning and had hundreds of fungus gnats flying around his tent. I also made the mistake myself of bringing one of my plants back into my tent. It was a mistake because I ended up constantly fighting an aphid infestation. It got so bad I threw out the plant altogether. So you can bring them inside but be very careful and inspect your plant closely for any sign of bugs. Make sure to check the underside of leaves too, a lot of bugs attach their larvae there so that you won’t notice them.

      Reply
      • Anonymous says

        February 27, 2021 at 09:33

        Jacob, you absolute right about the bugs. Just made that same stupid mistake last fall, I’ve spent 6 months getting rid of spider mites and some other flying pest. It wasn’t until I harvested, gutted the room, bleach, bug spray, all sorts of shit and I really hope they don’t come back.

        However in response to Jessie, if you don’t already have an indoor garden established then bringing them inside to bud isn’t going to hurt anything. Might actually help you control the population in a small environment. If you have bugs.

        Grow tip for everyone dealing with spider mites and or other pests… best way to fight nature is with nature. Don’t use chemicals, don’t use neem oil or other spray products. Find your self some lady bugs. Lady bugs destroy spider mites, eggs and other pests without hurting your plant. Try to do some research about the company you are buying them from. Crazy as it sounds, lady bugs that are bred and raised in captivity will usually stick close to where you release them. A lot of companies collect lady bugs from the wild and ship them to your door. Those lady bugs will tend to fly away upon release even if you have plenty of spider mites for them to eat. I still haven’t found a good company, I where I live it’s freezing outside, my last batch of lady bugs were all frozen, only half came back to life so I won’t be ordering for another couple months. But hopefully I have my problem under control to where I won’t need them. But that’s my advice on bug control. Fight nature with nature. Praying mantis are also good but those fuckers creep me out. I don’t want them in my home 😂. Outdoor garden sure!

        Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Cannabis Cultivation

Best Water For Weed Plants

Best Water For Weed Plants (Ideal Temperature, PPM, pH)

Growing Autoflowers Without Nutrients

Growing Autoflowers Without Nutrients (Is It Possible?)

Pruning To Increase Yield

Pruning To Increase Yield (Only If You Do It Right)

Best Humidifier For Grow Tent

Best Humidifier For Grow Tents (Reviews And Comparison)

Grow Tent Vs Grow Room

Grow Tent Vs Grow Room (Differences And Which Is Best For You)

Best Lights For Vegging Cannabis

Best Lights For Vegging Cannabis (Two Types Stand Out)

Quictent 4 by 4 grow tent

Quictent Grow Tent Review (Is The Slightly Higher Price Worth It?)

Carbon Filter Outside Grow Tent

Carbon Filter Outside Grow Tent (What You Need To Know)

Flowering Clones Back To Veg

Can You Switch Flowering Clones Back To Veg? (And How To Do It)

Secret Jardin Grow Tent Review (Great Value At All Price Points)

More Posts from this Category

Buying Guides

Best Timer For Grow Lights

Best Timer For Grow Lights (Reviews And Buying Guide)

Best Scissors For Trimming Weed

Best Scissors For Trimming Weed (Reviews And Buying Guide)

Best Digital Scale For Weed

Best Digital Scale For Weed (Reviews And Buying Guide)

Best Microscope For Checking Trichomes

Best Microscope For Checking Trichomes (Reviews And Buying Guide)

Best Fan For Grow Tents

Best Fan For Grow Tents (Reviews And Comparison)

Recent Reviews

Vivosun Grow Tent Review (Low Price, But How Is Quality?)

Bloom Plus Review (Good Budget Quantum LED Grow Lights?)

Aceple AG-6000 review

Aceple AG-6000 Review (Can It Really Substitute A Spyder Or Gavita?)

ChilLED Growcraft Review (A Viable Spyder Alternative?)

Viparspectra XS Series Review (Budget Price, Name-Brand Components)

Viparspectra Pro Series Review (Budget Quantum LED Grow Lights)

Timber COB LED Review

Timber Grow Lights Review

Rapid LED DIY COB Review

Rapid LED DIY COB Grow Light Kits Review

Meijiu quantum board 480w led grow light

Meijiu Quantum Board LED Grow Light Review

Kingbrite Quantum Board LED Grow Light Review

Kingbrite LED Grow Light Review

Recent Articles

Types Of Grow Lights For Indoor Plants

Types Of Grow Lights For Indoor Plants (Which Is Best For You?)

How To Tell If A High Pressure Sodium Bulb Is Bad

How To Tell If A High Pressure Sodium Bulb Is Bad

6/2 Light Schedule

6/2 Light Schedule (Why We Don’t Recommend It)

Leaving Grow Lights On 24 Hours

Leaving Grow Lights On 24 Hours: Killer Yield Or Yield Killer?

What Size Grow Tent Do I Need For Plants

What Size Grow Tent Do I Need For X Plants?

Footer

Important Pages

  • Home
  • About
  • Contact
  • Privacy Policy
  • Resources

Follow Us

  • Facebook
  • Pinterest
  • Twitter

Search

Image Reuse

Images on this site are free to share (unless attributed to a 3rd party), as long as you give credit to Grow Light Info and provide a link back to the page from which the image came.

Disclaimer

Some recommended products may use affiliate links. GrowLightInfo.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. As an Amazon Associate I earn from qualifying purchases.

*Amazon and the Amazon logo are trademarks of Amazon.com, Inc, or its affiliates.

Copyright © 2022 · Grow Light Info · All rights reserved.