Supplemental Lighting

Supplemental lighting is key in cannabis cultivation, helping growers provide optimal light levels for photosynthesis and plant growth. Utilized indoors or when natural sunlight is insufficient, it precisely manages light cycles crucial for vegetative and flowering stages, ensuring healthier plants and increased yields. With various advanced lighting options available, growers can enhance plant development and quality, making supplemental lighting integral to efficient and successful cannabis production.

UV Light (Ultraviolet)

Ultraviolet (UV) light, ranging from 10 to 400 nm, is significant in cannabis biology, potentially enhancing THC production as a plant defense mechanism. It also influences secondary metabolites like terpenes, affecting aroma and therapeutic properties. Growers use lighting systems that mimic natural UV light to optimize plant health and potency. Proper management of UV light is essential in cultivation, balancing the benefits and risks to produce robust and high-quality cannabis.


Photoperiodism in cannabis influences when plants enter the flowering stage, requiring specific light-dark cycles for growth and maturation. As short-day plants, cannabis needs longer nights to trigger flowering, critical for timing development and optimizing yield and potency. Mastery of photoperiodism allows growers to control plant lifecycle phases, enhancing cannabis quality and consistency in their cultivation process.

Vegetative Growth

Vegetative growth is a critical developmental stage in cannabis cultivation, focusing on leaf, stem, and root expansion. Optimal light, particularly blue spectrum from MH lamps or full-spectrum LEDs, encourages strong structural growth, preparing cannabis plants for the blooming phase. Growers provide long light exposure, usually 18-24 hours, to maximize vegetative growth, prevent early flowering, and establish foundations for a high-yielding harvest. Proper light management during this phase is essential for robust plant health and productivity.


Photopigments in cannabis plants, like chlorophyll and carotenoids, are critical for light absorption and response, impacting photosynthesis and cannabinoid synthesis. The knowledge of photopigments helps optimize plant health, yield, and quality by using proper lighting to promote energy conversion. Tailoring light exposure enhances growth and specific compound production, maximizing crop potency and meeting consumer demands in cannabis cultivation.


Wattage measures power consumption of grow lights in cannabis cultivation, a vital factor affecting photosynthesis, growth, and yield. Growers consider wattage for optimal light intensity across plant growth stages, balancing energy efficiency and cost. With advanced LED technology offering lower wattage and higher efficiency, wattage is a key metric for sustainable, productive cannabis growth operations.


Photoreceptors in cannabis are crucial proteins that allow the plant to sense and respond to light, influencing development and growth. These receptors trigger germination, flowering, and shade avoidance by absorbing specific light wavelengths. Cryptochromes and phototropins regulate circadian rhythms and direct growth towards light. Cultivation practices leverage knowledge about photoreceptors to optimize environmental lighting, inducing desired plant responses and enhancing cannabinoid production. Understanding photoreceptor functions is key in advancing cannabis horticulture, enabling precise control over growth conditions and improving yield and quality.


Photosynthesis in cannabis biology is the process where plants convert light into energy, critical for growth and cannabinoid production. Optimization depends on factors like light quality, CO2 levels, and PPFD, with growers fine-tuning these conditions to enhance plant health and potency. Advanced lighting and climate controls aid in sustaining efficient photosynthesis, crucial for high-quality cannabis cultivation.


Photoregulation in cannabis biology is the process by which plants manage growth through light perception, critical for regulating key stages like flowering. Light acts as a signal, activating genetic pathways via photoreceptors sensitive to specific wavelengths. Understanding photoregulation allows cultivators to use light to optimize cannabinoid and terpene biosynthesis, leveraging advanced lighting to enhance crop quality and yields. This grasp of plant-light interactions underpins successful cultivation, marrying agronomy with the nuanced science of cannabis photobiology.

Photoselective Screening

Photoselective screening is a technique in cannabis cultivation that filters light to control plant exposure to specific wavelengths. This method is key to shaping cannabis growth, morphology, and cannabinoid content by emphasizing beneficial light and reducing harmful wavelengths. Different screen materials can promote traits like increased terpenes or bushier growth, enhancing both the yield and quality of cannabis. Properly applied photoselective screening taps into plant science to fine-tune cultivation, aiding growers in producing top-tier cannabis through thoughtful and innovative agricultural strategies.