Light Requirement Rating
is ranked on a scale of 0 to 5 based on how much light it requires
for optimal growth.
This largely affects which regeneration method is best for the tree but also inflences where a seed or seedling should be planted. Older trees always require more direct sun than seedlings. The growth rate of the tree is best when the tree recieves a certain amount of sun.
In general if you have done a clearcut you may plant trees that require full sun because they will have the fastest growth. If you have done a seed tree treatment, you would want to manage something that has three or four suns. A shelterwood or group selection cut would regenerate best with trees that have 1 or 2 suns. If you want trees to grow in a forest with a very dense canopy that has not had any cutting then you want trees with no suns.