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The Aries by Fohse

640W Home Garden LED Grow Light

Our A3i model is the most powerful and efficient commercial LED grow light the world has ever seen...
Now re-imagined for the home grow as The Aries

More info Spec Sheet

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You Asked, Fohse Delivered.

The demand among the home grow community for Fohse fixtures has been tremendous. We’re pleased to offer a powerful and efficient solution to all those who grow on their own.
PPF: 1,755 μmol/s (Options up to)
PPE: 2.63 - 2.80 μmol/J (Options up to)
DLC 3rd party listing
PPE & Grow Light Efficiency

You’ll notice we post the efficacy performance of the Aries as a range. These figures represent the top and bottom ends of how well your Aries 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 at full power in the ‘Spring’ spectrum, while the highest figure is representative of running the Aries at 50% output in the ‘Autumn’ spectrum.


This is Unprecedented Canopy Penetration

Early generation LED lamps failed the cannabis industry due to low output + poor canopy penetration. The secret of the Aries' success starts with abundant PAR focused onto your canopy by polycarbonate focal lenses. Next, the Aries LED grow light delpoys an advantage you won't find anywhere else—swiveling light bars to achieve maximum canopy penetration by cross illumination to neighboring grow plots.
View: PPFD Maps (Actual & Simulated)
Focal Lenses 688
Swiveling heatsinks for custom footprints

Never Buy Another Bulb Again

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 is available?

Buy right, buy once.
L90: 40,000 hours (Based on diode manufacturer specs)
L70: 110,000 hours (Based on diode manufacturer specs)
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 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. 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 has no ‘Infrared Spike’ in its spectrum, meaning drastically less heat radiating down on and damaging your canopy.
Passively cooled
Thermally-conductive aircraft grade aluminum
7,200 in2 (Heat-dissipating surface area)
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.

Less AC Less AC

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.

Less AC Even Warmth

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

Less AC More Bud Growth

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

Less AC More Cannabinoids

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

Less AC More Terpenes

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

Less AC Higher Harvest Quality

More cannabinoids and better terpene profiles means you'll enjoy some of your best harvests yet with the Aries.

Dustproof. Watertight.

Your grow environment isn’t the friendliest place for sensitive electronics. That’s why the Aries can withstand the intense conditions of your grow. It’s impervious to hitchikers (dust, mites, aphids, spores). It can even withstand full submersion in 1 meter of water.
Ingress Protection Rating: IP67

Ingress Protection

Ingress Protection testing really puts our fixtures through the ringer : sandblasting, water spray, pressure washing, submersion, etc. Rest assured your Aries is well-protected from the hazards of your grow environment.

Dust intrusion protection

Impervious to small particulates 6/6

Liquid intrusion protection

Can withstand 1 meter submersion for 30 minutes 7/8

A Full Cycle Fixture

We designed the Aries with three distinct spectral modes to suit each stage of your crop’s growth cycle from vegetative, to early flower, and finishing with late flower.
3 Spectral Distribution Modes
Wall-Mounted Network Control

Fixture Control Made Simple.

The Fohse Central Control module required to operate the Aries LED grow light. One module controls up to 100 fixtures.

Central Control Manual

Easily Integrate With Your Environment

Installation is simple and the learning curve with high-quality LED is short. If you’ve never cultivated under high-intensity light levels, we have a long list of cultivation experts who have had success with our fixtures standing by to coach you and your team to incredible harvests.

Grow Like a Pro. Shop Fohse.

Other light brands boast about being the best. We won’t just tell you we’re the best. We’ll prove it.
Full Technical Specs

Frequently Asked Questions

  • My Aries fixture isn't functioning properly. What should I do?

  • What is the light footprint?

    The Aries LED grow light is best suited for a standard 4×4 plot. Feel free to use your favorite PPFD meter to play around with the fixture’s swiveling light bars to come up with your own custom footprints.

  • What is the recommended height / canopy distance?

    We recommend finishing your flower 3-feet away from the fixture at full power on the ‘Autumn’ spectrum setting, but this variable is strain-specific and also influenced on the rest of your environment parameters (grow medium, watering method, nutrient delivery method, cooling capability, etc). The Aries was designed to give you control over your light levels without ever having to adjust the height throughout your grow cycle, but at the end of the day we recommend using your favorite PPFD meter to dial in your perfect height.

  • Can the Aries be used in a vertical setting?

    It sure can. You can use your Central Control unit to set light levels anywhere between 30% and 100% output. Using your preferred PPFD meter you’ll be able to dial in the perfect light level to suit your vertical environment.

  • What is the plug type?

    Type B, 3-pin plug. If you live in a part of the world with different socket types, we recommend picking up a plug converter from your local hardware store.

  • Can it go in a 4x4 tent?

    Absolutely! In fact, we recommend reflective walls for any size grow plot to help reduce the light-dissipating effect of the Inverse Square Law

  • What voltage can the Aries run on?

    The current configuration of the Aries is made to operate on standard 110V. It can be ran up to 277V, but that would require a DIY swap for a different plug which would void the fixture’s warranty.

  • How many amps does it use?

    5.82 Amps. (640W ÷ 110V = 5.82 Amps)

  • How should I hang the fixture?

    Hanging instructions and hardware are included with each Aries. You can download the instructions here, too.

  • How do I clean my Aries fixture?

    We recommend spraying the your fixtures down with a 2% bleach-water solution and then rinsing down with a hose. The fixture is certified IP67 so rest assured it will be safe from any water intrusion following this cleaning protocol.

  • How many Aries fixtures can I link to my Central Control unit?

    Up to 100.

  • Does the Aries get hot?

    No hotter than a sinkfull of hot dishwater.

  • Is the Aries passively cooled or actively cooled with a fan?

    The form factor of the Aries will passively dissipate heat over thousands of square inches of surface area where it can easily be wicked away by your environment’s fans.

  • What is umol/J and why does it matter?

    It reads “micromoles per Joule” and is a measurement of how efficient a grow light is at converting watts to PAR photons, or its “photosynthetic photon efficacy” (PPE). Many shady manufacturers will mislead you by saying their light is capable of high PPE figures, but will leave out the fact they load the fixture up with red diodes which are more efficient than white or blue. The Aries is currently the most efficient grow light out there with a Balanced Spectrum optimal for horticulture.

  • Do you sell/ship to my country?

    We currently ship all over the world.

  • What is your return policy?

    Our 3-year warranty covers manufacturing defects. Since grow lights depreciate with use, we cannot accept returns for any other reason. If you need to inquire about a warranty claim, please open the chat helper and indicate you’d like to open a support ticket. Our technicians will respond within 24 business hours to assist you.

  • How can I sign up to distribute Fohse products?

    We’re always looking for partners around the world to carry our state-of-the-art LED grow lights. Please fill out our contact form and indicate you are a distributor. A member from the Fohse team will respond within 24 business hours to assist you.

  • Why are some of the leaves on my plants twisting or bleaching?

    This could be a sign that your Aries is powered up too high. Try dimming the light seeing if that corrects the issue. If not, you may have other issues to investigate such as watering or nutrient protocols.

  • Should I wear protective glasses when working under my Aries?

    Yes, basic sunglasses will work. The Aries is bright and frequent, repeated exposure without protection will strain your eyes.

  • Is it true that growing with LEDs requires slightly higher room temps than HID setups?

    In most cases, absolutely. HID bulbs have a huge spike in the infrared range (manufacturers conveniently stop their spectrum charts short of the IR range) that is traditionally handled with lower room temps. The Aries does not have this inefficiency, so you’ll be able to dial back the cooling and let your room temp rise. We recommend using your preferred thermographic camera or similar instrument to ensure your leaf surface temperature (LST) is around the 82-85°F range. Any lower and photosynthesis will slow down.

  • After a power outage will my Aries come back on?

    Once power comes back on the Aries will return to whatever state it was in prior to the power outage.

  • Should I use a surge protector with my Aries?

    The Aries has two internal surge protection and line filter circuits already included inside so no surge protector is needed.