King Plus 3000W LED Grow Light (2024): Review (Full Spectrum LED Light), Guide & FAQs

Last Updated on December, 2023 by Rob Wilson

In order to ensure that your plants are getting a solid, good growth indoors, you need to make sure that they are being provided with the perfect alternatives to natural elements. Grow lights are a core part of this growing process – and King Plus makes some of the best indoor LED grow lights that you can provide your marijuana plants with. In this article, we will provide you with the King Plus 3000W LED Grow Light, which is a full-spectrum LED light that helps your weed grow better and makes sure that your plants provide the maximum possible yield. 

In this article, we shall also be taking a detailed look at a lot of other aspects of grow lights – such as what exactly they are, the benefits of using a grow light, how to choose the right grow light for your plants, etc. We then take a quick look at the brand ‘King Plus’. Following that, we examine the King Plus 3000W LED Grow Light in a review and then we shall look at some of the pros and the cons of this grow light, and then answer some frequently asked questions about the same. 

Everything You Need to Know About Grow Lights

Growing a marijuana plant indoors means you will need to provide it with all the elements it is supposed to get outdoors – but they need to be artificially created. On paper, this sounds rather complex but when you actually set out to do it, it’s a rather simple task. You need to get hold of all the right equipment – such as grow lights, ventilation kits, grow tents, etc. and you’re all set to grow your own weed. Grow lights form one of the core parts of this process of growing weed indoors – as they offer a number of benefits to the plants. Here’s a look at why you need grow lights:

What is the importance of grow lights

Plants need light for a lot of their processes – first off, they require lights to make sure that they are getting proper growth as plants tend to grow in the direction of the light source. To add to that, sunlight helps trigger two important processes – the production of chlorophyll which is an important pigment, as well as the process of photosynthesis, using which the plants make ‘food’ which gives them the energy. Their intake of oxygen and carbon dioxide is also dependent upon the light. Lastly, lighting also helps the plants force-enter the bloom phase. 

There are a number of grow lights that you can find in the markets but LED grow lights such as  the King Plus 3000W hold a special importance. Let us now look at what makes LED lights better than regular grow lights:

Why are LED Grow Lights Best for Growing Weed?

LED grow lights are simply the best for growing marijuana indoors because of multiple reasons. The most important of these reasons that every grower must know and understand is the fact that LED grow lights draw the least amount of power while providing the highest amount of lighting – be it in terms of lumens or wattage! Furthermore, LED grow lights also have a much higher lifespan compared to older grow lights such as Metal Halides, HPS Grow Lights or CFLs. To add to that, LED grow lights can function even when some components get damaged as they are not interlined to each other – and lastly, they are easy to dispose of as they do not carry any harmful chemicals in them. 

King Plus: Is it a credible brand?

King Plus is a brand which is known for making big and bright LED lights and this is just another of these products from them. The company (KingLED) has been into this business for over 8 years now and is one of the most seasoned and experienced names in the markets. The brand is based out of Shenzhen in China and offers the growers with some of the best quality grow lights – especially for those with particularly large needs such as this 3000W LED grow light here. In addition to manufacturing LED grow lights, KingLED also manufactures lighting equipment specially developed for aquariums. They also put special emphasis on research and development of their products and have a good customer care support system for their buyers worldwide. All in all the brand has a positive rating and a decent credibility in the markets.

King Plus 3000W LED Grow Light Review (2024) – is it worth buying?

Here’s a detailed review of the King Plus 300W LED grow light where we have tried to cover as many aspects of this grow light as possible!

Design and Durability

Measuring in at 26” X 15” X 6”, this is one of the largest grow lights that you can find for your grow tents or grow rooms. At 3000W, this size and shape is almost expected. The light weighs 16.2 lbs and can be easily hung in large grow tents as they are equipped to handle weights of close to 150-200 lbs with ease. The main panel features a single compartment behind a glass screen which has 300 LEDs built in it. 

On all four sides of this grow light are vents for heat to escape. On the right side, you’d find two switches – marked VEG and BLOOM, to be turned on during those phases of growth. Between the two switches is the port where the main power cord goes in. There’s no provision for daisy chaining in this LED grow light. On the back side of the KingLED 3000W LED Grow Light, you would find three slots for the fans so that the heat can escape from there, along with four hoops using which this grow light can be hung properly.  All in all a decent design and a durable grow light.

Spectrum and Light Details

This is a full spectrum LED grow light, which helps the growers ensure that their plants are getting as close to natural lighting as possible. There’s a 12-band full spectrum of lights involved in this process, which ranges from 380 nm to 780 nm – there’s also IR lighting and UV lights which are involved, which is great for the growers. Each of the diode here comes with an additional optical lens cover which is great for the overall lighting experience.

There are 300 LEDs here, each operating at 10W giving you a total output of 3000W. The LED lights here are focused at 90°&120° mixed angles which gives the plants a good benefit of direct lighting. Most importantly, there are two different switches of VEG and BLOOM mode which ensure different kinds of lighting can be provided to these plants during different phases of their growth. During the VEG phase plants need a higher shade of blue while during the BLOOM stage the reds are more important. 

Brand Value and Credibility

As we’ve discussed above, KingLED is a good name in the markets and growers who use this grow light have left behind largely positive feedback about it. Most growers are happy with the company and its services. King LED has been making lighting equipment for over 8 years now and they’ve gained quite a specialization in this field by now and are a brand trusted by most experts. The brand value and credibility is pretty good and it fetches a decent resale value as well.

Coverage Offered

Here’s the best part about the King Plus 3000W LED Grow Light – the coverage that you get. Most of the times when people are looking for large grow lights they’re not sure what they’ll get. There’s plenty of small and mid sized grow lights available between 300W to 1200W – and even upto 2000W there’s a lot of options. But once you go beyond that you’re on uncharted territory and this is just the perfect option. This 3000W LED grow light covers an area of an impressive 7.8’ x 8’ which is pretty large and can cover up an 8×8 grow tent with ease during the vegetative phase. The area shrinks down a little during the bloom phase where the flowers begin to emerge as you need to move it closer to the plants – then it becomes 6.5’ x 6’ which is still pretty wide for a single LED light panel!

Power Performance

Another front where this grow light delivers really well. When you say your LED grow light is a 3000W light, it does not mean that it consumes 3000W of power too. This basically means that the light output you’re getting can replace a traditional 3000W lighting solution. When you look at the actual consumption and the amount of power it draws from the power socket, it is about 1/5th of the total output – the power draw is approximately 610W when you switch on the VEG as well as the BLOOM switches and it goes down significantly when you switch either of the two off. There might be a variance of about 5-10% than the figure quoted by the manufacturer but it doesn’t usually go beyond that.

PAR Values

When you look at the PAR value and the results that you get from PAR testing, you get very impressive numbers. The results are 1582 uMols when this grow light is hung from a height of 18” and 923 uMols when hung from a height of 24”. These numbers are impressive but also this is something that you expect of it because this is a 3000W LED grow light which is extremely bright and hence a good PAR score!


Cooling is another important aspect of any grow light, but is essential to look at when you’re looking at anything upwards of 1200W because this is when it starts to get REALLY hot. This grow light, thankfully, has an excellent cooling system. There’s a combination of multiple fans working on the back side which make sure that the heat is dissipated pretty well. Any heat that remains trapped inside the system can damage not only your plants but the grow light too! However thanks to the strong cooling system made with the fans and the heat vents, you get a great grow light here which ensures the heat does not stay in the body. However some growers have complained that the fans do get a noisy.

Warranty, Cost, and Delivery

The warranty that you get with the King Plus 3000W LED Grow Light is that of an impressive 3 years, which is among the best in the industry. There are only a handful of companies which offer more than this and this is a really good statistic. In addition to the three year warranty that the King Plus 3000W LED grow light gives you, there’s also a 30-day return period where you get your full money back if you are unhappy with the way this grow light is functioning. This basically shows the amount of trust that the company puts on their product! It is delivered by Amazon and is a fast delivery which ensures that your product reaches you in a good condition. Returns are also easy, thanks to Amazon.

Pros and Cons of King Plus 3000W LED Grow Light

Now that you understand all the features of this grow light and everything that it has to offer, here’s a closer look at some of the advantages and disadvantages of using the King Plus 3000W LED Grow Light to grow marijuana indoors:

  • Great value for money, 3000W at almost $300 is a great deal
  • Really bright lights – your plants will grow fast and have a higher yield
  • Covers a really large area of almost 8’ x 8’
  • Offers VEG and BLOOM switches for easy operation during both phases
  • Full spectrum LED grow light – provides light which is very similar to the natural light of the sun
  • Cools down quite well – important feature to have in big grow lights
  • Long warranty period of 3 years
  • Lifespan of 100,000 hours as claimed by manufacturer


  • Does not support daisy chaining
  • Looking directly at it for prolonged time can damage eyes, too bright
  • Fan is a little noisy


Final Verdict on King Plus 3000W LED Grow Light: Should you buy it?

The one thing that buyers of this LED grow light must know is that this is among the best options that you have if you are looking forward to buying a grow light for a large area. This is a really bright grow light for large tents and for those who have their plants spread out rather widely. The lighting towards the central area is rather dense and very bright. Furthermore, when you look at the pricing of this grow light (around $300), it isn’t really bad because the light is pretty big and pretty bright. This is a full-spectrum light for your marijuana plant which comprises of the 12 important bands which make it feel like natural sunlight. The massive coverage area is the cherry on top! All in all, a must-buy for growers who need to cover larger areas. 

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Frequently Asked Questions (FAQs) About LED Grow Lights

Here are the answers to some frequently asked questions about this LED grow light that many growers often tend to wonder about. 

1. Is this a good and bright LED grow light for growing marijuana?

Yes, this grow light is quite durable and very bright. In fact it is so bright that we strongly recommend you to not look at it when operating it at full brightness as prolonged direct exposure to this light might cause damage to your eyes! This is a perfect grow light for those who have large area coverage needs. 

2. How much area does this grow light cover?

While the Amazon sellers page does not give you an exact estimate, we have found the grow light to cover a really large area of upto 7.8ft x 8ft from a height of 22 inches during the vegetative phase and when you move it closer during the flowering phase, it covers about 6.5ft x 6ft as your flowers bloom. All in all this is an ideal grow light for tents between 6×6 to 8×8 and can be used in combination with smaller grow lights for tents as big as 10×10 or 12×12. 

3. Is it legal to buy this LED grow light?

Yes, buying LED lights is a totally legal activity and would not draw any legal trouble but you need to be careful about what you are growing. Certain plants are illegal to grow, such as marijuana – and every country and state might have different laws about it. So you need to check with your local law enforcement if growing weed is legal in your area, and if it is legal, how much weed can you grow.

4. What is the expected lifespan of this grow light?

The manufacturer has claimed that this LED grow light can last you for 100,000 hours of usage, which is the standard lifespan of most LED grow lights this size.

5. What is the warranty on KingLED’s King Plus 3000W LED Grow Light?

The warranty that you get on this grow light is that of 3 years, which is a pretty impressive term compared to most other grow lights which offer 1 to 2 years on an average. Moreover there’s also a money back guarantee for the first 30 days if you’re unhappy with the product which is an added bonus.

6. How much power does this LED grow light draw?

While the wattage that you get here is equivalent to 3000W, you don’t need to worry about so much electricity being consumed from your power socket. This is the biggest benefit of using LED grow lights – this one draws only about 610W (+/- about 5%) when both VEG and BLOOM switches are turned on. The consumption goes down by a bit when either of the two are turned off. 

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To conclude, the one thing that we would like to highlight yet again is that when you look at large grow lights – in terms of area covered as well as in terms of the brightness that you get, this is one of the best LED grow lights in the market. We hope that our King Plus 3000W LED Grow Light review helped you gain a better understanding about the details of this light and a better perspective on whether or not you should be buying it. Do let us know in the comments or drop us an email if there’s anything that you feel we’ve missed out on or if there’s something more that you would like to know about. Till then…

…Happy Growing! 🙂


  • Rob Wilson

    Rob Wilson is a maverick horticulturist and alchemist of the herbal world. With an uncanny green thumb and a passion for unlocking the secrets of cannabis cultivation and processing, he blends science and artistry to orchestrate nature's most intricate symphony. Rob's journey is an odyssey of coaxing delicate trichomes and potent terpenes into harmonious existence. When not lost in his garden, he's a devoted educator, guiding fellow enthusiasts through the verdant realms of cannabis cultivation.