Eftersom AI är så jäkla inne just nu så ställde jag frågan i en sån där AI chat också. Det är inte alltid jag håller med, men här till 98%:
Lux measurements are useful in certain contexts when working with plant lights, but they have significant limitations. Lux measures the intensity of light as perceived by the human eye—essentially, how “bright” a light appears to us. However, plants do not use light in the same way; they rely on specific wavelengths in the 400–700 nm range (PAR: Photosynthetically Active Radiation) to drive photosynthesis.
Here’s a step-by-step breakdown of the logical reasoning:
Lux values are calculated based on human visual sensitivity. This means that lights emitting wavelengths that our eyes see as brighter (such as green or yellow) can show high lux even if those wavelengths are not the most efficient for plant growth.
In contrast, plants primarily utilize red and blue wavelengths for photosynthesis. This is why metrics like PAR, PPFD (Photosynthetic Photon Flux Density), and PPF (Photosynthetic Photon Flux) are more relevant for evaluating the effectiveness of grow lights. They directly measure the usable light (photons) that plants require.
That said, lux measurements can still be useful in practical scenarios: • They can help growers to assess the overall light distribution in a space (e.g., ensuring uniform coverage across a canopy). • They are valuable for relative comparisons and for positioning a light at an appropriate distance from plants. For example, using a lux meter to determine if light is decreasing significantly with distance helps in optimally adjusting the height of LED grow lights. • Lux meters are much less expensive than PAR meters, so they sometimes serve as a more accessible, albeit rough, estimation tool for indoor growers.
Ultimately, while lux data can provide helpful information about light distribution and intensity for human environments or for general setup purposes, relying solely on lux for assessing plant lighting is inadequate. Growers are encouraged to use additional measurements (like PPFD and PAR) to ensure their plants receive the wavelengths they need for optimal growth.
Thus, lux measurements do have some use in plant light setups, especially for determining relative light distribution and ensuring proper positioning, but they should not be the only metric used when trying to determine a light system’s effectiveness for plant growth.