The Aries PRO by FOHSE
660W Aries PRO LED Grow Light.
Our most powerful and efficient full-spectrum commercial LED grow light, now re-imagined with 7 tunable channels and a smaller footprint.
Our Aries PRO model is the most powerful and efficient commercial LED grow light the world
Volume discounts apply. Price match guarantee.
FOHSE is the world’s leader in LED grow technology. Every light we manufacture includes patent pending technology that puts FOHSE ahead of our competition. We developed and manufactured the Aries PRO to include our patent pending LED technology that makes FOHSE the best grow lights for indoor plants. We aim to give every client the best price on the Aries PRO as possible while keeping the world leading power and efficiency for cannabis plant growth. When you contact our lighting experts they will identify every opportunity for cost savings on FOHSE Aries PRO grow lights – such as volume discounts – that will be passed along to you. Request a quote to get started.
Aries PRO Technical Specs
Please fill out the following form to download the full technical specs
Your Requests, Our Solutions: FOHSE Delivers
Meet the Demand: The Fohse Aries PRO 640W fixture answers the call for powerful and efficient solutions, that allows for customizable spectrum control, in smaller footprint settings.
CO2 Requirements
Growing under high-intensity light conditions will require you to recalibrate every aspect of your environment, and chief among that is CO2! We advise all our clients to supplement at least 1200ppm of CO2 in their environment. Keep a close eye on your plants and take detailed notes every crop cycle to find the sweet spot. CO2 gives your crop the carbon building blocks they need to build biomass, and without an adequate amount it won’t matter how much light your system throws down.
supplement CO2
PPE & Grow Light Efficiency
You’ll notice we post the efficacy performance of the Aries PRO as a range. These figures represent the top and bottom ends of how well your Aries PRO unit will convert electricity to usable photons. LEDs tend to operate more efficiently when operating below maximum output. The lowest PPE figure is representative of running the Aries PRO at full power in the ‘Spring’ spectrum, while the highest figure is representative of running the Aries PRO at 50% output in the ‘Autumn’ spectrum.
Maximize Canopy Penetration
Early generation LED lamps failed the cannabis industry due to low output + poor canopy penetration. The secret of the Aries PRO success starts with abundant PAR focused onto your canopy by polycarbonate focal lenses. Next, the Aries PRO LED grow light deploys an advantage you won’t find anywhere else—swiveling light bars to achieve maximum canopy penetration by cross illumination to neighboring grow plots.
How Much Light is Too Much?
When you manufacture the most powerful grow light in the world, this is a question we often get. The short answer is your plants will tell you. The deeper answer is, well, it depends on what other factors in your environment are limiting your crop from fully utilizing all available light – watering schedule? Leaf surface temperature? Ambient CO2? Genetics?
For our cannabis clients, the question is actually ‘How much light can cannabis take?’ The answer to that question is, we really don’t know (click the link to listen to Dr. Bruce Bugbee’s thoughts on the matter).
On of our clients in Michigan is really pushing their genetics to find out, and after setting back-to-back, record-breaking harvests all throughout 2020, they still haven’t found the top! Follow this link for a brief summary of their results over 40 harvests.
How much light is too much?
Precision Light Planning
If there’s one thing we’ve learned touring close to a thousand cultivation facilities around the world, it’s that every environment is unique with its own special requirements. When you work with FOHSE, our partnership kicks off with a thorough review of your grow room plans and your goals. Our light planning team heads into our simulation software to develop a 100% custom configuration tailor-fit to the unique needs of your operation. We can even take it a step further and predict your cost of cooling, cost of electricity, and how much you’ll save owing an Aries PRO system over time.
Ultimate control over your lighting capabilities.
The first of it’s kind, unlock your plants true potential with full spectrum tunability. The Aries PRO has upgraded tunability consisting of 7 isolated spectrum channels including: UVA, green, far red and more providing customizable brightness and spectral output throughout the growth cycle.
End expensive bulb replacment, for good.
Let’s be honest – bulb-style grow lights are a hazard. Burns, waste, breakage … why subject your passion for growing to these hazards when a better option, like the Aries PRO is available?
Aries PRO Grow Light PPF Degradation
1 “day” = 12 hours of use
When to replace your Aries PRO?
50,000hours
Bulbs Die Suddenly. LEDs slowly fade.
Our L90 and L70 figures come straight from the data sheets and stress-testing provided by our diode manufacturers. To put the L90 of the Aries PRO into perspective, after 50,000 hours of use the fixture’s output will have diminished to 1,613 μmol/s, which is still better than the output of every other LED grow light in the same class as the Aries PRO. And just how long is 50,000 hours? If you run 12/12 cycles every day that’s 4,166 days … 595 weeks … 136 months … 11.4 years of runtime and your system will still outperform every other comparable LED grow light out there. (and of course all those bulb changes you’ve eliminated)
Make a Friend Out of Heat
Unlike obsolete plasma burning grow lights, the Aries PRO has no ‘Infrared Spike’ in its spectrum, meaning drastically less heat radiating down on and damaging your canopy.
The Infrared Spike
Ever notice how most spectral charts for grow lights stop around the far-red region? That’s because extending the chart into the infrared region would show one of the biggest problems with plasma-burning light sources… an enormous spike of radiative heat!
HID's Dirty Secret The IR Spike
7,200 in2
Is Heat Harming Your Crop?
There’s no way around it: the ‘infrared spike’ with HID grow lights is damaging to your crop. While harm reduction methods do exists, you can eliminate it entirely by switching to the Aries by FOHSE.

Without the IR spike cooking your upper canopy, you’ll need far less cooling to compensate in order to keep your LSTs in an optimal range.

A reduction in radiative heat and chilled air compensation makes for a much more even LST temperature throughout your upper to lower canopy.

An even canopy LST temperature promotes more RuBisCO reactions down your canopy, leading to more instra-canopy bud development.

Cannabinoids are heat-sensitive. No more destructive IR spike means more cannabinoids make it to harvest.

Terpenes are also heat-sensitive compounds and degrade at higher temperatures. Enjoy some of your best terp profiles ever!

More cannabinoids and better terpene profiles means you’ll enjoy some of your best harvests yet. Experience the results of the best full-spectrum LED grow lights.

Elevate Plant Health with Our 4-in-1 Integrated Sensor for Temperature, Humidity, CO2, and PPFD Optimization
Analysis Parameters
Room Size
875 ft²
Fixtures per Room
A3i PRO = 30
Avg. PPFD = 1,671 μmol/m2s
Avg. Power Level
A3i PRO = 1110W
Min: 750W, Max: 1500W
Daily Usage
12 hours
A/C EER
11
Labor Cost
$15/hr
Room Count
40
HPS = 45
Avg. PPFD = 1,162 μmol/m2s
HPS = 1082W
$/kWh
$0.10
Cost per Bulb
$40
operating
cost
$768,282 | Savings: $527,660
$1,295,942
Costs
$639,360
$933,120
Costs
$128,922
$289,472
Maintenance
Costs
$0
$73,350
operating
cost
$1,472,629 | Savings: $996,987
$2,469,616
Costs
$1,214,784
$1,772,928
Costs
$257,845
$549,988
Maintenance
Costs
$0
$146,700
operating
cost
$2,151,191 | Savings: $1,492,118
$3,643,309
Costs
$1,709,209
$2,616,736
Costs
$360,983
$810,523
Maintenance
Costs
$0
$220,050
operating
cost
$2,842,646 | Savings: $1,974,348
$4,816,994
Costs
$2,365,632
$3,452,544
Costs
$477,013
$1,071,049
Maintenance
Costs
$0
$293,400
operating
cost
$3,534,100 | Savings: $2,456,577
$5,990,677
Costs
$2,941,056
$4,292,352
Costs
$593,044
$1,331,575
Maintenance
Costs
$0
$366,750
operating
cost
$4,225,554 | Savings: $2,938,806
$7,164,361
Costs
$3,516,480
$5,132,160
Costs
$709,074
$1,592,100
Maintenance
Costs
$0
$440,100
operating
cost
$4,917,009 | Savings: $3,421,035
$8,338,044
Costs
$4,091,904
$5,971,968
Costs
$825,104
$1,852,626
Maintenance
Costs
$0
$513,450
operating
cost
$5,685,291 | Savings: $3,948,696
$9,633,987
Costs
$4,731,264
$6,905,088
Costs
$954,027
$2,142,099
Maintenance
Costs
$0
$586,800
operating
cost
$6,299,918 | Savings: $4,385,494
$10,685,411
Costs
$5,242,752
$7,651,584
Costs
$1,057,165
$2,373,677
Maintenance
Costs
$0
$660,150
operating
cost
$6,991,372 | Savings: $4,867,723
$11,859,095
Costs
$5,818,176
$8,491,392
Costs
$1,173,195
$2,634,202
Maintenance
Costs
$0
$733,500
115°F / 46°C
Heat TransferBlank
How does the Aries PRO generate so much power yet remain relatively cool to the touch? The secret is in the engineering advantage harnessing the principles of conductive and convective heat transfer. We’ve packed over 16,000-in2 of surface area into the A3i’s custom heat sinks. This effectively dilutes and disippates any heat across all that surface area via conductive heat transfer. This makes it much easier for the normal ambient airflow to wick that heat away from the fixture via convective heat transfer where it can be easily shuttled out of your grow environment.
Dustproof. Watertight. Safe to Handle.
IP66
Ingress Protection
Ingress Protection testing really puts our fixtures through the ringer : sandblasting, water spray, pressure washing, submersion, etc. Rest assured your Aries PRO is well-protected from the hazards of your grow environment.
Easily Integrate With Your Enviroment
Grow Like a Pro. Shop FOHSE.
We won’t just tell you we’re the best grow light manufacturer. We’ll prove it.
Contact us today for a custom light plan.
Full Technical Specs
The Aries PRO by FOHSE
660W Aries PRO LED Grow Light.
Our most powerful and efficient full-spectrum commercial LED grow light, now re-imagined with 7 tunable channels and a smaller footprint.
Our Aries PRO model is the most powerful and efficient commercial LED grow light the world
Volume discounts apply. Price match guarantee.
FOHSE is the world’s leader in LED grow technology. Every light we manufacture includes patent pending technology that puts FOHSE ahead of our competition. We developed and manufactured the Aries PRO to include our patent pending LED technology that makes FOHSE the best grow lights for indoor plants. We aim to give every client the best price on the Aries PRO as possible while keeping the world leading power and efficiency for cannabis plant growth. When you contact our lighting experts they will identify every opportunity for cost savings on FOHSE Aries PRO grow lights – such as volume discounts – that will be passed along to you. Request a quote to get started.
Aries PRO Technical Specs
Please fill out the following form to download the full technical specs
Meet the Demand: The Fohse Aries PRO 640W fixture answers the call for powerful and efficient solutions, that allows for customizable spectrum control, in smaller footprint settings.
CO2 Requirements
Growing under high-intensity light conditions will require you to recalibrate every aspect of your environment, and chief among that is CO2! We advise all our clients to supplement at least 1200ppm of CO2 in their environment. Keep a close eye on your plants and take detailed notes every crop cycle to find the sweet spot. CO2 gives your crop the carbon building blocks they need to build biomass, and without an adequate amount it won’t matter how much light your system throws down.
supplement CO2
1,866 μmol/s
2.92 μmol/s
PPE & Grow Light Efficiency
You’ll notice we post the efficacy performance of the Aries PRO as a range. These figures represent the top and bottom ends of how well your Aries PRO unit will convert electricity to usable photons. LEDs tend to operate more efficiently when operating below maximum output. The lowest PPE figure is representative of running the Aries PRO at full power in the ‘Spring’ spectrum, while the highest figure is representative of running the Aries PRO at 50% output in the ‘Autumn’ spectrum.
Early generation LED lamps failed the cannabis industry due to low output + poor canopy penetration. The secret of the Aries PRO success starts with abundant PAR focused onto your canopy by polycarbonate focal lenses. Next, the Aries PRO LED grow light deploys an advantage you won’t find anywhere else—swiveling light bars to achieve maximum canopy penetration by cross illumination to neighboring grow plots.
How Much Light is Too Much?
When you manufacture the most powerful grow light in the world, this is a question we often get. The short answer is your plants will tell you. The deeper answer is, well, it depends on what other factors in your environment are limiting your crop from fully utilizing all available light – watering schedule? Leaf surface temperature? Ambient CO2? Genetics?
For our cannabis clients, the question is actually ‘How much light can cannabis take?’ The answer to that question is, we really don’t know (click the link to listen to Dr. Bruce Bugbee’s thoughts on the matter).
On of our clients in Michigan is really pushing their genetics to find out, and after setting back-to-back, record-breaking harvests all throughout 2020, they still haven’t found the top! Follow this link for a brief summary of their results over 40 harvests.
How much light is too much?
Precision Light Planning
If there’s one thing we’ve learned touring close to a thousand cultivation facilities around the world, it’s that every environment is unique with its own special requirements. When you work with FOHSE, our partnership kicks off with a thorough review of your grow room plans and your goals. Our light planning team heads into our simulation software to develop a 100% custom configuration tailor-fit to the unique needs of your operation. We can even take it a step further and predict your cost of cooling, cost of electricity, and how much you’ll save owing an Aries PRO system over time.
The first of it’s kind, unlock your plants true potential with full spectrum tunability. The Aries PRO has upgraded tunability consisting of 7 isolated spectrum channels including: UVA, green, far red and more providing customizable brightness and spectral output throughout the growth cycle.
Let’s be honest – bulb-style grow lights are a hazard. Burns, waste, breakage … why subject your passion for growing to these hazards when a better option, like the Aries PRO is available?
Aries PRO Grow Light PPF Degradation
1 “day” = 12 hours of use
When to replace your Aries PRO?
50,000hours
Bulbs Die Suddenly. LEDs slowly fade.
Our L90 and L70 figures come straight from the data sheets and stress-testing provided by our diode manufacturers. To put the L90 of the Aries PRO into perspective, after 50,000 hours of use the fixture’s output will have diminished to 1,613 μmol/s, which is still better than the output of every other LED grow light in the same class as the Aries PRO. And just how long is 50,000 hours? If you run 12/12 cycles every day that’s 4,166 days … 595 weeks … 136 months … 11.4 years of runtime and your system will still outperform every other comparable LED grow light out there. (and of course all those bulb changes you’ve eliminated)
Unlike obsolete plasma burning grow lights, the Aries PRO has no ‘Infrared Spike’ in its spectrum, meaning drastically less heat radiating down on and damaging your canopy.
The Infrared Spike
Ever notice how most spectral charts for grow lights stop around the far-red region? That’s because extending the chart into the infrared region would show one of the biggest problems with plasma-burning light sources… an enormous spike of radiative heat!
HID's Dirty Secret The IR Spike

Analysis Parameters
Room Size
875 ft²
Fixtures per Room
A3i PRO = 30
Avg. PPFD = 1,671 μmol/m2s
Avg. Power Level
A3i PRO = 1110W
Min: 750W, Max: 1500W
Daily Usage
12 hours
A/C EER
11
Labor Cost
$15/hr
Room Count
40
HPS = 45
Avg. PPFD = 1,162 μmol/m2s
HPS = 1082W
$/kWh
$0.10
Cost per Bulb
$40
operating
cost
$768,282 | Savings: $527,660
$1,295,942
Costs
$639,360
$933,120
Costs
$128,922
$289,472
Maintenance
Costs
$0
$73,350
operating
cost
$1,472,629 | Savings: $996,987
$2,469,616
Costs
$1,214,784
$1,772,928
Costs
$257,845
$549,988
Maintenance
Costs
$0
$146,700
operating
cost
$2,151,191 | Savings: $1,492,118
$3,643,309
Costs
$1,709,209
$2,616,736
Costs
$360,983
$810,523
Maintenance
Costs
$0
$220,050
operating
cost
$2,842,646 | Savings: $1,974,348
$4,816,994
Costs
$2,365,632
$3,452,544
Costs
$477,013
$1,071,049
Maintenance
Costs
$0
$293,400
operating
cost
$3,534,100 | Savings: $2,456,577
$5,990,677
Costs
$2,941,056
$4,292,352
Costs
$593,044
$1,331,575
Maintenance
Costs
$0
$366,750
operating
cost
$4,225,554 | Savings: $2,938,806
$7,164,361
Costs
$3,516,480
$5,132,160
Costs
$709,074
$1,592,100
Maintenance
Costs
$0
$440,100
operating
cost
$4,917,009 | Savings: $3,421,035
$8,338,044
Costs
$4,091,904
$5,971,968
Costs
$825,104
$1,852,626
Maintenance
Costs
$0
$513,450
operating
cost
$5,685,291 | Savings: $3,948,696
$9,633,987
Costs
$4,731,264
$6,905,088
Costs
$954,027
$2,142,099
Maintenance
Costs
$0
$586,800
operating
cost
$6,299,918 | Savings: $4,385,494
$10,685,411
Costs
$5,242,752
$7,651,584
Costs
$1,057,165
$2,373,677
Maintenance
Costs
$0
$660,150
operating
cost
$6,991,372 | Savings: $4,867,723
$11,859,095
Costs
$5,818,176
$8,491,392
Costs
$1,173,195
$2,634,202
Maintenance
Costs
$0
$733,500
115°F / 46°C
Heat TransferBlank
How does the Aries PRO generate so much power yet remain relatively cool to the touch? The secret is in the engineering advantage harnessing the principles of conductive and convective heat transfer. We’ve packed over 16,000-in2 of surface area into the A3i’s custom heat sinks. This effectively dilutes and disippates any heat across all that surface area via conductive heat transfer. This makes it much easier for the normal ambient airflow to wick that heat away from the fixture via convective heat transfer where it can be easily shuttled out of your grow environment.
IP66
Ingress Protection
Ingress Protection testing really puts our fixtures through the ringer : sandblasting, water spray, pressure washing, submersion, etc. Rest assured your Aries PRO is well-protected from the hazards of your grow environment.
We won’t just tell you we’re the best grow light manufacturer. We’ll prove it.
Contact us today for a custom light plan.
Full Technical Specs