Lux vs. PAR
What is the best unit for light, used for plant growth?
Most lighting products are designed for the use of people. These products will use the term lumen and Lux. The term Lux comes from the photometry based on the average sensitivity of the human eye. The maximum sensitivity is around 555 nm (yellow light) and decreases with longer (red) and shorter (blue) wavelengths.
In practice, often still the term Lux is used.But does this apply to today's greenhouse? Plants have a different sensitivity to light of different wavelengths. In green plants, the sensitivity to red light is highest and green the lowest. Therefore, the term Lux is not right for the exposure of green plants. Light sources can be considered as sources of energy particles, which are called photons or light quants.
Why is the term micromoles (μmol) used in the case to specify lamps?
Most lighting products are designed for the use of people. These products will use the term lumen and Lux. The term Lux comes from the photometry based on the average sensitivity of the human eye. The maximum sensitivity is around 555 nm (yellow light) and decreases with longer (red) and shorter (blue) wavelengths.
In practice, often still the term Lux is used.But does this apply to today's greenhouse? Plants have a different sensitivity to light of different wavelengths. In green plants, the sensitivity to red light is highest and green the lowest. Therefore, the term Lux is not right for the exposure of green plants. Light sources can be considered as sources of energy particles, which are called photons or light quants.
Why is the term micromoles (μmol) used in the case to specify lamps?
