Increase Yield & Plant Health
Indoor Grow Lights


GrowRay’s grow lights surpass the output of traditional DE HPS lights in intensity, optimized spectrum, uniformity of high-value PPFD (Photosynthetic Photon Flux Density) and longevity. GrowRay’s modular construction permits future upgrades to tomorrow’s LEDs for a fraction of the cost of a new lighting system. GrowRay utilizes​ high-output ceramic LEDs from Osram, a world leader in solid-state lighting.

GrowRay’s passive heat management system is critical to maintaining the intensity and lifetime of its LEDs. In addition to CAD heat-management modeling and field-testing, GrowRay’s fixtures produce the most powerful and uniform light available. Full spectrum provides better canopy penetration, utilizing the green spectrum to transport photosynthetic receptors in the red and blue range.

The GrowRay proprietary spectrum increases plant visibility and eliminates the eye strain that can result from working under HPS lights. A higher Color Rendering Index (CRI) helps the grower see potential problems at the canopy level with greater clarity than traditional HPS, HID and many LED fixtures.

Cannabis Grown With Full Spectrum LED


Warehouse applications can count on over 40% energy savings compared to an 1100W DE ​HPS​, (with wall plug to wall plug measurements). Lower HVAC costs, both installation and ongoing, account for over 40% energy savings. ​Much higher LEDi efficiencies translate to far less heat produced.

GrowRay lights are designed for professional, commercial horticultural applications, where production is pushed to the maximum. Passive thermal dissipation ensures efficient heat transfer from LED and drivers, avoiding the main cause of LED degradation and failure: heat overload. GrowRay LEDs (LEDi) are the highest quality available. They have a longer life, and produce reliable light intensity and quality over the long haul. The thermal map (​above) shows how efficiently GrowRay fixtures manage heat. Within a half inch of the light bar, the vast majority of heat is dissipated.


GrowRay lights are designed for clones, seedlings, and early-stage plants, all the way to full flowering. For lower light applications, GrowRay lights can be programmed from full power to about 20% of full power with a smartphone app (Android only for now), or with an NFC accessory wand (not included) for a tablet, laptop or PC.


GrowRay’s high output, modular four, six and eight-bar systems deliver the most uniform and intense lighting coverage available today. They are designed to be a superior 1:1 replacement of DE HPS fixtures. GrowRay luminaires deliver industry-leading PPFD (Photosynthetic Photon Flux Density) and efficacy numbers.  GrowRay also provides a unique, PhD-designed spectrum that increases both dry weight yield and THC/terpene profiles.



Plants depend on light, or Photosynthetically Active Radiation (PAR) to photosynthesize and grow. PAR is the light from violet to near infrared, the spectral range between 400 to 700nm.  It includes the entire spectrum that we humans can see.  And while human eyes are most sensitive to green at 555nm, plants use every photon in this range, regardless of its wavelength.  The entire spectral range contributes to the photosynthetic process.​ GrowRay lights are designed to produce different amounts of PAR. The common unit of measurement for PAR is Photosynthetic Photon Flux Density (PPFD), measured in units of moles per square meter per second.

Plants can also use light from outside this range, from UV at 350nm to almost infrared at 750nm, as part of the development of new tissues and compounds​.  This is called photomorphogenesis. Cannabis plants thrive in extremely bright, high PAR environments. They grow best with a bright, even light across the entire growing area.  GrowRay lights are computer-designed and field-tested to provide an efficient, extremely bright light that is distributed evenly across the full growing area.  This gives each plant the best opportunity to grow to its maximum in the shortest possible time, and to produce the most flower and best results.

Compared to typical HPS 1100 Watt DE HPS, GrowRay’s grow lights demonstrate brighter and more even light levels. Even though the center numbers are intentionally matched for a fair comparison, the HPS light falls off dramatically at the edges of a standard 4 ft. x 4ft. square compared to the GrowRay TR8.

Also important, is that due to the amount of heat generated, the HPS could never be used as close to a plant canopy without burning the plants below it, while still having insufficient PAR for the plants at the edge of this 4 ft. x 4ft. square.

For purchasing information and consultations Email or Call (970) 329-1705