No, PAR (Photosynthetically Active Radiation) and lumens are not the same
PAR refers to the range of light wavelengths that plants can utilize in the photosynthesis process, typically falling within the 400-700 nm spectrum. It is the measure of intensity and quality of the light required by plants for growth.
Lumens, on the other hand, measure the total amount of visible light emitted by a source. It is a unit of measurement that gauges the brightness perceived by the human eye. While lumens encompass the entire range of visible light, PAR focuses specifically on the wavelengths used by plants.
In summary, PAR is focused on the specific spectrum of light that aids in plant growth, whereas lumens measure the overall brightness of a light source as perceived by humans.
PAR, or Photosynthetically Active Radiation, is categorized into different levels based on its intensity. High light is typically considered to be a PAR value above 200 µmol/m²/s.
In the context of plant growth, high PAR levels provide more energy to the plants, often resulting in increased growth, better fruiting, and flowering. These higher levels of PAR are suitable for plants that require intense sunlight, such as certain vegetables, flowering plants, and many tropical species.
However, high PAR levels may not be suitable for all plants, as it could lead to stress or damage in some species. Careful consideration of the specific plants' needs and proper monitoring of PAR levels are essential for achieving optimal growth and health.
These high PAR values are usually found in specialized horticultural lighting systems that can be adjusted according to the plants' requirements.