White light affects plant growth differently depending on its composition, specifically the ratio of blue light to other wavelengths.
Here's a breakdown:
- Warm White Light (Lower Blue Light): Generally promotes stem elongation and leaf expansion.
- Cool White Light (Higher Blue Light): Typically results in more compact plants with shorter, sturdier hypocotyls (the stem of a germinating seedling).
Therefore, the specific effects depend on the type of white light being used. Initial growth under cool white LEDs can be beneficial for establishing strong seedlings.
