Keywords: PPFD, light uniformity, PPE, best PPFD map, comparison test, 6 elements of plant grow lights,


Conclusion: G80 series plant grow lights are ahead of well-known brands, 500W Win 640W Philip* 1700 , 650W Win 800W Gavit* RS 2400E.


PPFD map, comparison test with famous brands


In any cultivation application scenario, PPFD maps outperform comparable products.



And they meet the 6 major elements of plant lights: effective (spectrum and PPFD effective for plants), high efficiency and energy saving, safe and reliable, long life, human-friendly, and intelligent control!


The Story of G80 Grow Lights:


Mr. Zhou (Co-founder and Engineer) reminisced and said,


Back in 2008, we unexpectedly received an order for plant growth lights from a Japanese customer. At that time, I wasn’t even aware that we were producing plant grow lights. However, a few years down the line, I was filled with joy when I witnessed the flourishing vegetables thriving under our plant lights!

Indoor hydroponic vegetables


The Earth’s land resources are finite, and the utilization of plant lights holds the potential to extend the livable space for humanity. Consequently, my fascination with plant lights has grown significantly.


Since 2016, I have dedicated myself to the independent design and development of plant growth lights.


My relentless pursuit revolves around creating the most exceptional plant growth lights globally.


Regardless of my efforts, surpassing the renowned brands in terms of photosynthetic photon efficiency (PPE) has proven challenging. I have seen incremental improvements, from 2.3 umol/J to 2.7 umol/J, and up to 3 umol/J.

Photosynthetic photon efficiency PPE of plant grow light – timeline


Despite our efforts, we can only match the luminous efficiency of other brands with our plant growth lights, and surpassing it seems unattainable.


Achieving the status of producing the best grow lights appears to be a distant goal. Therefore, I initiated an actual indoor planting experiment, hoping to discover the solution within the practical application of planting.


The experiment takes place in a 2800 sqft area, where a multi-layer rack system is utilized to cultivate vegetables and strawberries, while grow tents are dedicated to growing tomatoes, peppers, and other crops.


Over the years, we have planted over 200 crops and conducted tests on more than 1000 variations of grow light spectra.

2800 square feet of experimental planting area


After many years of practical planting at the site, I discovered that there was consistent light outside the plant canopy, along with a prominent and intense center hot spot of light generated by the grow lights. As a result, it became necessary to increase the distance between the grow lights and the plant canopy to prevent the plants from being scorched by the intense hot spot at the center of the grow lights.



Schematic diagram of light uniformity and plant growth



I realized:

Photosynthetic photon efficiency PPE is important though, and more importantly, it is ensure that all the light emitted by the plant growth light reaches the plant canopy, maximizing the utilization of the emitted light from the grow lights.


No matter how high the photosynthetic photon efficiency PPE is, only the light PPFD converted into the plant canopy is effective, and the light that cannot reach the plant canopy will go to waste.


Based on this, I designed the Koray secondary optical system, which can improve the PPFD illumination and light uniformity at the same time.


In order to achieve the best optical effect, we continuously enhance photometry and conduct experiments with various optical devices. We explore approximately 500 types of circuit boards for testing the G80 series plant grow light, aiming to determine the most suitable options.

Continue to optimize and test with circuit boards


Based on different application scenarios, we produce a range of sizes and rigorously verify them multiple times to identify the optimal PPFD (Photosynthetic Photon Flux Density) map.




3 different optical systems – directing light onto the plant canopy – while reducing central hotspots and improving light uniformity


At the same time, we continue to conduct spectrum experiments to determine the best spectrum formula for practical cultivation. Moreover, we diligently explore over a thousand spectra to discover the most effective light recipe formula.



Grow Light Spectrum



Endured for a span of 6 years, the G80 series of grow lights in 2023 proved to be an extraordinary leap forward.


G80 plant growth lights, each one far exceeds the competition


Koray secondary optical technology enhances the penetration of light onto the plant canopy, ensuring optimal light exposure.


Additionally, there is no central hot spot results in a more even distribution of light throughout the growing area.


Compared to similar products, grow tent cultivation offers superior advantages, while shelf rack system cultivation outperforms even renowned brand products.


4x4ft grow tent for growing medicinal plants, G80-500W win P* 640W




4x4ft rack cultivation, G80-650W win G* 800W




5x5ft grow tent for growing medicinal plants, G80-800W is better than other brands 1000W



4x8ft rack cultivation, G80-500W win P* 640W


G80 plant grow light: A remarkable advancement in optimizing light utilization, propelling it to new heights. It is Magnificent Leapfrogged!


The G80 grow light exhibits superior performance in two key aspects: Firstly, it delivers higher PPFD (Photosynthetic Photon Flux Density) at the same power output. Secondly, it consumes less power while maintaining an equivalent PPFD level.


Comparison testing against all competitors is welcome!



Preferred spectrum:

Preferred spectrum


G24B spectrum: low green light, better photosynthetic efficiency, suitable for commercial cultivation of medicinal plants.


F99 and U195 adjustable spectrum: suitable for experiment and research.


U40 and U50 spectrum: The actual cultivation of medicinal plants in North America for many years, the effect is excellent.



Energy Efficient

Adopt Koray secondary optical technology to improve light uniformity and illuminance PPFD, more energy-saving.



G80-650W plant grow light – Rack system full-cycle cultivation of medicinal plants



For practical application scenarios, Koray secondary optical technology enhances the amount of light that reaches the plant canopy and ensures uniform light distribution without any central hot spots.




4x4ft grow tent cultivation 500W is better than P* 640W, each lamp can save 613 kWh of electricity per year (12 hours a day)

G80-500W Grow light – Grow Tent – rack System vegetative growth or mother plants



4x8ft shelf rack cultivation 500W is better than P*640W, and 2 lamps can save 1635 kWh of electricity per year (16 hours per day).

G80-500W grow light – rack System PPFD map


Safe and reliable

Potting protection is adopted to ensure enhanced reliability.

G80 series plant growth lights feature renowned international brand LED diodes, offering a highly reliable power supply, low temperature rise, and long lifespan. Additionally, the spectrum of these lights boast a high color rendering index, making them human-friendly.

Potting waterproof IP65


Each item adheres to the 6 major elements of plant lights! It is truly the best grow light.



G80-500W can be upgraded to 600W,

G80-650W can be upgraded to 730W,

800W can be upgraded to 1000W, and we offer 1500W as well.


Compatible with “Horti Guru” intelligent plant light control system.


Horti Guru Grow Light Control System



*PPFD Test equipment Apogee MQ-610


MQ-610 ePAR Meter


Author: Grow light Engineer