If there’s one thing that’s become clear in horticulture, it’s that there’s more to lighting than just lighting the most efficient LED lights you can find. In a new white paper, Sollum Technologies explains why the quality of light matters.
Previously, Sollum white papers educated growers on seasonal and daily changes in light quality (i.e. spectrum) and quantity (i.e. intensity and brightness). photoperiod), which have a significant impact on plant growth and development. “While the impact of light quantity may seem more obvious, that of light quality is more abstract due to the nanoscopic nature of light,” explains Rose Seguin, agronomist at Sollum Technologies. “With the quantity of light, we can easily discern whether the light is more intense and whether the day is longer or shorter. With the quality of light, we consider the spectrum, therefore the breakdown of light into different colors, their wavelengths and the relative amounts of each wavelength.”
She explains how the quality of light varies both seasonally and daily, as weather conditions and the atmospheric path traveled by light impact the absorption and scattering of different wavelengths, resulting in a gap between pure sunlight and what reaches the plant canopy. “Considering the spectrum in terms of photon ratios has facilitated the study of the impacts of light quality on plant growth and development, with the main ratios of interest being red on blue (R: B) and red to far-red (R:FR). Researchers are also beginning to study blue to green (B:G) and blue to far-red (B:FR), among others,” says- she.
Tool to guide plant development
“Understanding the morphological impacts of different photo ratios allows a grower to exploit these ratios as a tool to guide plant development,” she says. “For example, the R:FR light ratio has been widely studied for its impacts on stem elongation, apical dominance, leaf expansion, photosynthetic efficiency, and flowering response in plants. short-day and long-day plants. Controlling the R:FR ratio in this way controls the architecture of plant morphology.”
Sollum Technologies has created a smart LED lighting solution that dynamically recreates the full spectrum of natural sunlight. Sollum™ works closely with its customers and research partners to create recipes adapted to the growth cycle of each crop, regardless of its climate of origin or the location of the greenhouse. To help growers get the most out of all these options, Rose explains what the effects of light can be.
Click here to view Sollum’s latest white paper “Photoreceptors and Red/Far-Red Impacts”.
Click here for other white papers from Sollum.