There is a twilight zone in the caves with limited light penetration.

However, they deteriorated water quality due to reduced light penetration and accumulation of organic matter in the lake ecosystem.

"You're actually increasing light penetration through the lip surface by applying something clear and shiny to them."

The plumes could impact zooplankton and light penetration, in turn affecting the food web of the area.

Thinning also allows more light penetration and air circulation; both important to tree health.

Freshwater habitats can be classified by different factors, including temperature, light penetration, and vegetation.

The deeper waters remain cool and dense due to reduced light penetration.

Environmental agents considered included water flow, light penetration, and water depth.

As water depth increases, the light penetration decreases making it difficult for either species to survive beyond certain depths.

The central theme behind Gothic architecture is light penetration.