PAR (photosynthetically active radiation) levels can vary depending on the type of plant and the stage of growth.
Generally, higher PAR levels are needed during the vegetative and flowering stages compared to the seedling stage.
For seedlings, PAR levels should be between 100-200 µmol/m²/s.
During the vegetative stage, PAR levels should be between 400-600 µmol/m²/s.
During the flowering stage, PAR levels should be between 600-1000 µmol/m²/s.
When using CO2 during the flowering stage, higher PAR levels can be beneficial. PAR levels of 1000-1200 µmol/m²/s are recommended when supplementing with CO2 to enhance growth and yields. However, it's important to monitor the CO2 levels and ensure they don't exceed recommended levels to avoid damaging the plants.
