Why do my plants still grow slowly even with LED lights?

If plants still grow slowly after using LED lights, it may be caused by a combination of factors.
First, you need to check whether the lighting parameters are appropriate, including light intensity (PPFD value), whether the spectrum matches the plant growth stage, and whether the lamp hanging distance and daily lighting duration are scientific.
Secondly, environmental factors such as temperature, humidity, and carbon dioxide concentration will significantly affect the growth rate of plants.
In addition, improper cultivation management (such as nutrient imbalance, too small container) or poor quality of lamps (incomplete spectrum, false power) may also be important reasons.
It is recommended to measure the actual light intensity first, adjust the height and lighting time of the lamp, optimize the temperature and humidity environment, and ensure that a regular brand of full-spectrum LED plant lights is used.
Different plants have very different light requirements. For example, lettuce requires much lower light intensity than tomatoes, so the maintenance plan needs to be adjusted according to the specific planting variety.