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Fohse O6i 1200W LED

In stock
As low as $1,445.00
Re-imagining greenhouse illumination. Effective greenhouse lighting is all about maintaining a balance between DLI and electricity costs. The O6i uses the latest advancements in LED tech to enable you to maintain peak DLI far more affordably than HID ever could. The O6i packs more photons into each footprint with a spectral distribution ideal for growing thick, lush canopies.

Fohse O6i 1200W LED

Current processing time 5-7 days

High voltage option available. Please call us at (707) 588-8844 for more information.

Re-imagining Greenhouse illumination

Compact Size, Significant Output

Central to your crop’s success is the idea that greater photon density leads to more carbon assimilation, which means more biomass. The O6i packs more photons into each footprint with a spectral distribution ideal for growing thick, lush canopies.

Greenhouse Toplighting Methods

Not every greenhouse is created equal, which is why Fohse developed two distinct models for greenhouse illumination. With the O6i model you’ll be able to achieve the highest amount of supplemental light, cast the widest footprint, and do so with fewer fixtures. By contrast, the Pleiades model is lower powered with a slim profile designed to line the trusses of your greenhouse. It is best-suited for greenhouses and hoophouses where uniformity and efficacy are the priorities. Whichever your preference, our team will help you make the right decision.

Precision Photon Density

The O6i is designed to be the easiest way to transition an HPS greenhouse system to LED without overhauling your existing electrical or truss infrastructure. So why make the change? 50% greater output than a 1000W DE HPS. 42% greater efficacy. No infrared spike generating unnecessary heat.

Automated Light Response

An O6i system is bundled with 'Light Harvesting' sensors that measure the natural light in your greenhouse. Cloud cover? Seasonal daylight fluctuations? The O6i with Light Harvesting can self-adjust in increments as little as 1% in real time based on the ever-changing light conditions in your greenhouse.

DLI Planning

In greenhouse environments your primary light source is an ever changing variable, so meeting your light intensity and consistency needs comes down to proper Daily Light Integral (DLI) planning from the start.

Say you want to maintain a PPFD of 1,000 μmol/ms2 throughout the year and you’re running a 12-hour photoperiod. Here’s the math to convert that to DLI:
1,000 μmol/m2s × 60 s/min × 60 min/hr × 12 hr/day= 43.2 mol/m2day
1,000,000 μmol/mol
For the Northen Hemisphere the lowest DLI month would be December. This information is important for determining how much supplemental light you need to plan for in order to maintain your target PPFD & DLI during the dimmest month of the year.
Subtract your minimum naturally provided DLI from your maximum target DLI to get your supplemental DLI need.As an example, the minimum naturally provided DLI in California during December would be 15 mol/m2day. If your maximum target DLI is 43.2 mol/m2day then your maximum supplemental DLI would be 27.8 mol/m2day.
Once your maximum supplemental DLI is determined, you can reverse the equation in Step 1 to calculated the average PPFD target your supplemental light plan should meet. In the case of our example, 27.8 mol/m2day would come out to a PPFD of 643 μmol/m2s.

The Last Fixture Purchase You'll Make

It’s no secret that LEDs last significantly longer than legacy HID systems. In an O6i greenhouse with Light Harvesting technology the effect of this truth is compounded considerably. By running the fixtures only when and as much as needed, the lifespan of your O6i system is generational.

Bulbs Die Suddenly, LEDs Fade Away

Fohse's L90 and L70 figures come straight from the data sheets and stress-testing provided by our diode manufacturers. Predicting the PPF degradation of your O6i luminaires is as simple as dividing the L-figures by the number of hours of daily use. If you were to run your O6i fixtures at full power for 12 hours a day you can reasonably expect its PPF to reduce by 30% over the course of 25 years. But this is only part of the picture. In practical use, you’ll rarely (if ever) run your O6i system at full power. Sometimes you won’t even run it at all.

Cool Diodes Are Efficient Diodes

That’s the secret to packing so much power into each footprint. Aircraft-grade aluminum heat sinks and two hyper-efficient variable speed fans keep the O6i’s LEDs operating at peak efficiency.

Make a Friend Out of Heat

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 06i 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 with the O6i!


More cannabinoids and better terpene profiles mean you'll enjoy some of your best harvest yet wit the O6i

Made for Damp Environments

Any controlled cultivation environment is susceptible to the rigors of fluctuating humidity. That humidity can be a serious risk to sensitive electronics, especially in greenhouses where humidity can turn into condensation and condensation into drips. We built the O6i to achieve an IP67 rating, which means drips will never be a problem. In fact, with an IP67 rating you can hose your fixtures down post-harvest without ever taking them down. That’s a real time saver.

Ingress Protection

Ingress Protection testing really puts Fohse fixtures through the ringer - sandblasting, water spray, pressure washing, submersion, etc. Rest assured your A3i is well-protected from the hazards of your grow environment.

Easily Integrated with Your Environment

One of the primary intentions with the O6i design was to make the experience of transitioning to LED grow lights as seamless as possible for greenhouses that currently use HID systems. If all you have to do is plug-and-play, it doesn’t get much more seamless than that.


  • PPF: 3,000 μmol/s
  • PPE: 2.7 μmol/J (depending on configuration)
  • L90: 50,000 hrs
  • L70: 110,000 hrs
  • IP67 rated
  • Thermally-conductive aircraft grade aluminum
  • 16,416in² Heat-dissipating surface area
  • High-efficiency variable speed fans
  • Passively and actively cooled
  • Wireless communication; mobile app controlled
  • Sunset, sunrise and manual dimming
  • Network controls for one-touch adjustments
  • Light harvesting for automated response
  • Custom integration options available
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SKU gl_led_131