Kind LED K3 Grow Light Review

After conducting years of research and development, KIND LED has finally released its revolutionary K3 series of LED grow lights. These well-construct lights feature high-powered 3W Light Emitting Diodes to give off an intensity and spectrum which most grow lights on the market just can’t match.  If you are searching for a grow light which will give you bigger and better yields – while also producing almost no heat and consuming half the power of HID lighting – then the Kind K3 series may very well be what you are looking for. With that said, here is our Kind LED K3 grow light review.

Kind K3 Series LED Grow Lights

4.5 drop rating

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Image result for green checkmark  12 Band Complete Spectrum
Image result for green checkmark  Secondary Optical Lens to Magnify PAR/Canopy Penetration 
Image result for green checkmark  Optimized Driving Current for Increased Diode Efficiency and Output
Image result for green checkmark  Large Heat Sinks and Quiet Fans
Image result for green checkmark  Plug-n-Play, Works with a Timer
Image result for green checkmark  Bright and High Yielding Footprint


Image result for red x mark  Pricey
Image result for red x mark  Customer Service can be Spotty

Benefits of Full-Spectrum LED Grow Lights

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Those who have been into indoor farming for some time now know that LED lighting technology is quickly replacing traditional lighting systems. This can be attributed to one fact – LED lighting comes with huge advantages over their traditional counterparts. Some of these advantages include:

  • Hurried harvest cycle – with LED lighting as the main source of lighting for plants, a grower can be able to alter or adjust the flowering cycle. This speeds up the entire growing cycle and eventually increases production.
  • Increased lifespan – when compared to traditional lighting systems, LEDs have a longer lifespan (over 50,000 hours).
  • Energy savings – though more efficient and advanced than traditional systems, grow lights consume about 60% less energy.

Kind LED K3 Grow Light Overview

LED grow lights are made up of light emitting diodes (LEDs). These diodes project or emit one specific wavelength from the electromagnetic scale. A wavelength is the visible, or sometimes invisible, color emitted by an LED light. Plants need to absorb an array of these colors, usually from 400nm – 700nm, to achieve photosynthesis.

Most grow light companies use just about 2 or 3 of the core colors needed by plants. This is not the case with Kind LED grow lights. The company goes all the way to feature a 12-band spectrum with the purpose of ensuring that plants receive every single lighting component they require for healthy and complete growth.

With this kind of engineering, it is obvious that Kind has put in years of experience and a lot of research to come up with this particular grow light.

The K3 L600 Vegetative Grow Light has been specifically designed for vegetative growth. It is ideal for the hobbyist with a grow tent or mid-sized grow room.

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K3 L600 Vegetative LED Grow Light’s Specially Tuned Vegetative Spectrum

In any indoor garden or grow room, the vegetative stage is, without doubt, the foundation for a fruitful flowering or fruiting stage. For those who don’t know, it is during this critical stage that plants create or form the lion’s share of the root mass. It is also during this stage that the plants establish their structure, i.e., the stem strength and the spacing between the branches.

Aside from that, many growers take advantage of the vegetative stage to manipulate the shape of their plants using different techniques all in a bid to increase yields. Now, while it’s true that shape manipulation can lead to an increase in yields, this cannot happen without one vital component – light.

Artificial lighting is the only source of energy for indoor plants, and it comes as no surprise that Kind has spent a lot of time and research perfecting the K3 L600 Vegetative LED Grow Light.

The K3 L600 Vegetative Grow Light comes with a specially tuned vegetative spectrum designed precisely for vegetative growth. With this particular grow light, growers can be assured of proper lighting during the vegetative cycle and as a result, a bountiful fruiting/flowering process.

Kind LED K3 LED Grow Light’s 12-Band Spectrum

Just like we have already mentioned, the K3 L600 Vegetative LED grow light comes with a 12-band spectrum. This is unlike most grow lights which come with only 2 or 3 of the most essential colors required by plants.

Now, for those who don’t know this already, each spectrum or color triggers a different response from plants. For example, the cooler colors, such as blue, induce vegetative growth. This particular spectrum or color intimately resembles the natural sunlight.

The warmer colors, like red, induce flowering, and so on and so forth.

Now, the K3 L600 Vegetative LED grow light comes with a 12-band spectrum thus ensuring that indoor plants receive every single lighting component they require for a healthy and complete growth at each stage of development. Plants that are not getting their complete lighting needs tend to become leggy and end up producing frail or wispy flowers.


Weight: 13 lbs.
Dimensions: 25″ x 11″ x 3″
Weight: 20 lbs
Max Wattage: 320w
HID Wattage Equivalent: 600w
Modules: 10
Diodes per Module: 15
Diode Wattage: 3W
Footprint: 3 ft. x 4 ft.
Input Voltage: 100-240V AC Power Input
Output Voltage: UL Standard Output Voltage – Less than 76V DC
Amperage: 2.67

K3 L600 Vegetative LED Grow Light


✓  1 Kind K3 L600 Vegetative LED Grow Light
✓  Hanging hardware
✓  Power cord

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Kind K3 L600 LED Grow Light’s Secondary Optical Lens

How deep should an LED penetrate plant canopy? Simple! Deeper than any other LED of the same wattage.

In usual circumstances, light penetrates a more open and airier canopy a lot more efficiently than a denser, fuller canopy with overlying leaves. In other words, there are several factors that determine how intensely light penetrates a plant canopy.

These factors include the shape, size, and thickness of the leaves, as well as the number of branches and spacing of plants.

Now, if the light intensity of a grow light is weak, it goes without saying that it won’t penetrate very deep.

The revolutionary “secondary optical lens” is a very special feature that comes with the K3 L600 Vegetative LED. With this feature, the grow light is able to not only penetrate plant canopy but to also connect with secondary and tertiary levels. The end result usually is a higher number of flowers, which equals to a far much higher yield.

Kind LED K3 Grow Light’s 3-Watt Diodes

The problem with larger diodes is that as diode size goes higher, so does the amount of heat dispelled. When it comes to watt diodes, bigger is not always better.

Even with 3-watt diodes, the K3 L600 Vegetative LED grow light is able to provide the best possible copy penetration without incurring the overheating issues that come with 5-watt diodes and other larger diodes.

L600’s 3-watt diodes run at a driving current of 650ma to incorporate the ultimate blend of efficiency, intensity, low operating temperatures, and durability.

Heavy Duty Heat Sinks of Kind K3 LED Grow Lights

One thing most indoor growers, especially new growers, overlook is proper ventilation in their grow tents or grow areas. When it comes to indoor gardening, it is of extreme importance to create a stable environment regardless of whether the grow area is a grow tent, greenhouse, warehouse, or a grow cabinet.

Even with all their efficiency, LEDs do emit a certain amount of heat which must be dispelled efficiently to avoid burning the plants. However, this does not imply that a grow room must be extremely cool for plants to develop optimally. Every grow room is different as are the needs of different plants. The trick lies in finding the right balance.

The K3 L600 Vegetative LED grow light boasts of thick and heavy duty 2 CM aluminum heat sinks. With these thicker-than- the-norm heat sinks, the grow light is able to dissipate or dispel heat much more efficiently than any other competing light on the market today.

Kind LED K3 Grow Light Warranty

Kind LED’s K3 L600 LED Grow Light comes with a generous 3-year warranty.

Growing Tips – Kind LED K3 Grow Light Review

Recommended Height

According to the K3 L600 Vegetative LED grow light manual, the further away the grow light is from the canopy, the bigger the coverage area. This may, however, lessen the light’s intensity.

Initially, the grow light should be hanged 36 inches above the canopy for an acclimation period of 3-6 days. After this period, the light should remain 18- 26 inches above the canopy.

Because plants have different needs according to their type, the surest way to know if the light is too close to the canopy is to pay closer attention to the leaves. If they appear bleached or twisted, then the light is indeed too close.

Additional Tips

Kind recommends that growers use protective eyewear in every setting where their grow lights are in use. This is because LEDs emit huge amounts of light which can be a bit hard on the human eye.

Kind LED K3 Grow Light Review: The Bottom Line

All in all, if you are looking for an LED grow light for your grow room, the K3 L600 vegetative LED is definitely something you should consider. The fact that the manufacturers of this particular light have spent decades in the indoor growing sector is more than enough to assure just about any grower of the result he or she may be looking for. Remember that this is a company that has continued to win awards year after year since the inception of their grow lights in 2013. It is a little more expensive than some of the competition, but we think its definitely worth the investment!

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Thanks for reading our Kind LED K3 Grow Light review.  Feel free to browse through other uPONICS pages, such as Hydroponics System, Hydroponics System ReviewsBest Grow Tent, COB LED Grow Light Reviews, Best Grow Lights for Weed, and AeroGarden Marijuana Growing.