The selected blue LED in GrowRay grow lights affect leaf movement, leading to flatter leaves, which result in a more efficient surface for light absorption. It also encourages fast leaf expansion, resulting in larger surfaces for light absorption and photosynthetic activity. Another very important attribute of the blue is related to stomatal activity regulation. Stomata are little apertures on the leaf surface which allow CO2 to move ​into the leaf. Higher concentrations of CO2 inside the leaf induce higher rates of carbon fixation and biomass production. Blue light induces stomata opening and allows for higher fluxes of CO2 inside the leaf.

The main photosynthetic pigment present in plants, chlorophyll a, has its light absorption peak at 660nm (red spectrum). LED in this wavelength are also part of the GrowRay proprietary spectrum. Using red LED GrowRay lights provides higher PAR values at lower energy consumption, maximizing​ energy use efficiency. Red light (together with far‐red light), also ​activates the photoreceptors responsible for flowering and photoperiod regulation, the phytochromes.

All GrowRay lights are equipped with white LED, which deliver full spectrum light to ensure primary and secondary metabolite production. GrowRay warm white LED are selected to match the required spectrum for optimal plant development throughout the veg and flowering stages. The white lights provide a constant full spectrum light supply, allowing for photomorphogenic processes to be controlled by individual blue, red and far‐red emitter manipulation without compromising photosynthetic activity. It ensures that the required light flux maintains optimum light energy conversion throughout the entire plant growth cycle.

GrowRay is pioneering the use of far‐red emitters in commercial LED lights. GrowRay lights are equipped with supplemental far‐red LED, that in conjunction with the red LED, provide light at phytochrome absorption peaks. Controlling the duration and ratio of red/far‐red light makes it possible to control plant behavior to increase biomass production and accelerate plant growth.

• Day Use Recommendation: The far‐red light provided by GrowRay increases photosynthetic efficiency, avoiding energy imbalances that can occur inside the photosynthetic apparatus under high‐light conditions. It allows the plants to convert more light energy into chemical energy which is required for biomass production and plant growth.
• End of Day Recommendation: (Research project underway to provide scientific data). Cannabis plant flowering is regulated by the photoperiod process. The cannabis photoperiod requires a minimum of 12 hours of darkness to flower. This process is controlled by the phytochrome photoreceptors. GrowRay far‐red emitters can manipulate the phytochrome response and trigger the plants into shorter dark periods, providing additional time for more flowering.