How to evaluate growlights- Part One: Phlizon 600W LED

Disclaimer: Blue/Purple grow “lights get the job done”. But do not expect more than that.

This article is a rant.
Its subjective, but backed with sources, experience and knowledge from over four years of growing with alleged top notch technology.

People are pretty simple if it comes to marketing. Everyone wants to buy the best valued components for the best price to get going. If you ever build your own PC or a drone you will know what im talking about. 
Creating a grow setup was a simple task ten to twenty years ago. You just had to go to one of these grow shops, where you talked with a clerk to get the best out of your budget for your operation. You got a tent, a HPS light, soil, nutes, seeds and some ventilation. Online and offline sources were limited to a few books the old masters wrote.

With spreding legalisation many companies jumped on the grow train trying to advertise their products to you. And i have to admit: They are good at it!

Google results for "grow light"
Google result of  “grow light” … That says it all.

Just google “grow light” and you are flooded with the infamous blue/purple spectra of common grow lights you find on amazon or alibaba. But a great search engine optimization does not equal the quality of the product.

False advertisement

To be honest: There is nothing wrong with running these lights. They are getting the job done. They will not get you near the results you always see on the famous pictures circulating on the internet. The lights are often praised with heavily exaggerated numbers. I will discuss the most bought LED grow lights from amazon.com and show you whats wrong with them.

Critical cannabis in flower
Get back to me, if you manage to do this with a single Phlizon 600 W. I did this with a 310 W light. So yours should be at least in the ballpark of my result. 😉

Example One: Phlizon 600W LED

Phlizon light from amazon
Phlizon 600W LED light. The hangers and hygrometer are actually useful. Pic from amazon.com


NO REFLECTOR NO DANGER- Many others’ grow lights are used led spotlight reflector to make the light look beautiful, but we don’t use it because the led reflector is not heat-resistant. If a short circuit occurs,reflector at 80℃ is easy to melt and fire. we do not use the reflector, we can not give up the safety beause of beauty.

Amazon Description

Reflectors are a thing of beauty huh?
Phlizon claims, that reflectors are useless and just melt, if there is a short circuit.
Do they assume their light will short curcuit at one point?
LEDs are emitting light in all directions. It actually enhances the optical properties of a light if you use reflectors. They just ditch them, because they think its just a cosmetic element. You actually need them to focus the light more in the direction of the canopy.

FULL SPECTRUM- We did lots of experimentation to ensure that this full spectrum design promotes plant growth. It includes universal Blue Red IR UV and white light provide everything plant desire in the natural sunlight. The expensive IR UV led promote plants to defense mechanisms, blue and red led is essential light for plant growth.


Amazon Description

Okay! Thats bold. The spectrum is one of the least “white” ones you could imagine. Its mainly blue and red. The McCree curve, where you can see, what intensity distribution your light should have is vastly different from Phlizons “white” light. White light is created if the spectrum contains of every wavelengths in equal parts. Its fine to build an only red-blue light, but do not call it white.

McCree Curve vs the phlizon spectrum
The McCree Curve behind the “full spectrum” of the Phlizon 600W spectrum. You get an idea whats missing here.

DOUBLE SWITCH- Veg and Bloom button have different function. Veg switch: It’s blue led and white led. For seeding or young vegetative growth,you can use Veg switch only. Bloom switch: It’s red led and white led.for flowering/blooming,you can use both Veg and Bloom switches. View Angle of LEDs: 90°and 120°


Amazon Description

Thats actually cool to save money on energy. I really doubt that your plants do well under one of these lights switched to veg, but useful nontheless. Good LED COB or Quantum Board system got a dimmer as well to do save energy.

COMPARE TO HPS/MH- The 600W LED grow light can replace traditional 400 watt HPS/MH while consuming only 108 watts! More effective coverage area than any reflector series lights. perfect for a 2x2ft growing area at 24″ height. The difference of us is that we use double cooling fans. Can most extend the light life.


Amazon Description

There is so much bullshit in here…
WHY would you name it a 600W LED if its an ACTUAL 108 Watt LED claiming it will replace a 400 Watt HPS
It will not even come close to a 400 Watt HPS output. The only honest fact in there is, that this light is perfect for a 2 x 2 environment. No grower with the right mind would setup a REAL 600 Watt light in that, nor a 400 W hps. 
What other purpose is there but to confuse the customer?

More confusing info

Screenshot of lamp info
What color is 600 W? The wattage is 108 Watt, not 600! From amazon.com

The made up 600 W are pulled entirely through the hole descripton. You can actually light up an area of 1.44 m² with a high quality 600 Watt LED light. This area is about 4x bigger than the 2′ x 2′ space advertised.

PPFD values from Phlizon amazon lamp
PPFD of 260 at 24″ distance is  about 1/4 of the optimal value. From amazon.com

They also claim that a hanging distance of about 24″ (61 cm) is the perfect height. I will not believe them any further but a PPFD value of 260 is way below the 700-1000 a high quality COB/Quantum Board light will deliver.

Conclusion: Phlizon 600 W

  • No, it is nowhere near a 600 W LED light. It is a 108 W low quality LED. You can replace your 100 Watt HPS with that, and will be happy, that this abomination will run a bit cooler.
  • No, the spectrum is not the perfect fit for your flowers. It is mass produced lowball asian LED that get put into mass produced low quality LED arrays.
  • You need actually 6(!) of these to light up a 5′ x 5′ tent. Thats about the size a high quality LED with 600 actual Watt could light up. That will cost you about $540. Buy a real light instead.

Do not buy this light if you expect a high yield, high quality harvest.

Buy this light if you just want to take a look into the hobby. But you might want to upgrade as soon as possible….

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23 thoughts on “How to evaluate growlights- Part One: Phlizon 600W LED”

  1. Thanks for the information. I took the route of setting up my 4 plant tent with this light. I quickly did the math on actual wattage draw so i put 6 of these daisy chained together and to be honest the growth has been great with no stretch at all. However in a 5×5 area i have 6 of these running with both veg and bloom on 18 hours a day. Any tips for an upgrade? Thanks

  2. Hello!!! You said get at you if you come close to your picture using exactly a phlizon 600w led. Well I grew 4 plants in a 2×2 tent with this exact light. Very close to harvest. No complaints at all with the light – plants grew extremely well. Will harvest over 2 oz dry.

    1. Hey i have the same set up going right now. 4 plants in 3G fabric pots in a 2×2 tent, with a phlizon 600W. You mind if we exchange pics of your harvest? i’m really interested in seeing what i can expect form my light

  3. Hey! I’m new to growing but was not looking to grow 3 or more plants. How many lights would you suggest buying just for experimentation? If I buy just one light, will the buds even flower?

    1. Go for at least 50W per squarefoot if youre going to use HPS or cheap LEDs. For “good” LEDs you only need about 35W per squarefoot.

  4. I’ve used this too, and it’s actually not bad for this price, rather the opposite, my plants loved this light.
    A lot of people assume that it have to cost your shirt to do a homegrow…. not always right.
    For any beginner this light is more than sufficient.
    See the recensions on amazon…. are they all fake? A lot of people are happy with these lights, including my self.

    1. They are clearly not all fake, but they hold not to its expectations. Like i disclaimed in the title: these lights work, but they dont deliver whats advertised.

  5. I’m old school and have not grown for a while I usually fill my loft with about 30 plants which took 6 hps lights what kind and how many led lights would I need to do the same ?

  6. also used this brand light in 1200w – im happy so far, can’t really compare to HPS as I haven’t used it. I have noticed with consistency though, growers who are married to HPS, or who have been growing pre-LED commercialized lights, are very stubborn about how much better HPS is … I’m only few years experienced, my mentor hates LEDs but my growth pattern is good … for me if you don’t have a commercial grow space or really high ceilings, you need something like this to maintain the climate and cost, it definetly has value I think this article could use updating, this is also the lowest level light they make, they have a big 3kwatt (629 actual) with 6 cob leds in it – https://smile.amazon.com/dp/B07QYRB1K9/ref=twister_B07ML3NXDB?_encoding=UTF8&psc=1

    Would love to know what you think about that, thanks for the helpful site.

    1. Sounds very fishy to me.
      Questions you should ask before buying such a light: Why do they put in the wrong wattage in the product name? Its 3000 W in the name, 625W actual draw, and in the further infos theyre writing something about 1000W.
      What Cree LEDs are they talking about? Yes, Cree is a good name concerning LEDs, but not every LED is the same! If its the CXB3950 theyre using, this light could be a good choice for $400.

      I also deal with HPS lovers alot. HPS lights have actually a good value considering the pricing. You know, most low priced LEDs are as good as HPS lights, but not particuarly better – and they still cost more than HPS lights…

  7. I own this light along with a couple other cheap Chinese knock off lights. I get equal results from the Phlizon as I do my more expensive Platinum P300 , the 2 other cheap lights bought off Amazon were Ledgle 300w complete junk. Started flickering 2 months after purchase and Dead in 9 months. It also showed in pictures it had lenses on the chips. Units do not have any. The last was a global star 300w which again falls short on what they claimed however it did have the lenses and is still running strong 4 years later. In short I agree with the O.P. on the Phlizon and wanted to add that Ledgle are also junk and they use bait and switch practices. Not sure why Amazon allows customers like this on there site?

    1. Friendly reminder that platinum 300 lights are equally shitty but more expensive to appear somewhat legit. Same with Kind LEDs…

  8. I’ve had no problems with these lights. Dont know what this guy is on about. Maybe the typical if it ain’t these lights then everything else is rubbish.

    1. Never said they dont work, Im just very critical about the way this light is advertised. There should be a low budget section for everything, and if youre happy with your results, stick to them 🙂

  9. Thanks heaps for this article. So many new growers out there think LEDs are the gold standard yet have never even tried a HPS or Metal halide globe.
    Im currently trying to find 2 different brands of LEDs to run next to each other and hense even out jagged spikes in their light spectrums. ( does that even sound like something that would work?)
    It’s actualy sad to see so many growers going for leds without researching them and the alternatives! So many of the positive reviews on websites are written within days of recieving the light so how can they even know if its good or not with atleast one grow! And dont forget atleast 15% of all comments and reviews are fake marketing. Atleast

    1. Im totally with you !! Its hard to get viable info after the market is basically flooded and usecases are illegal in most countries 🙂

  10. Hello.
    I appreciate your knowledge in the mathery and adequate opinion about china’s led lamps 🙂
    May I ask for an opinion ?
    What you looks these board (https://www.spider-farmer.com —-> sf-2000-led-grow-light) ? Is it good value for money ?

    They are use UF/IR leds too. I have some scepticism about efficiency of it.

    Thanks for help.
    Goodluck!

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