UV Light.
It is evident that very little UV light is transmitted; therefore, while Marlon CS Longlife has a high visible light transmission, it forms a very good shield against UV light. As a result the interiors of buildings can have very good levels of natural daylighting while the contents are little affected by the UV light. A low level of UV light transmission is also an important condition for the growth of many plants. High opacity to UV light also means that Marlon CS Longlife is a good material to protect people against the harmful effects of UV light yet allows enjoyment of natural light.

Infra Red Light.
Marlon CS Longlife is quite opaque to infra red light wavelengths above 2100 nanometres approximately. When daylight enters a building it absorbed by interior surfaces and contents raising their temperature. The heat is reradiated as infra red radiation, little of which can pass out through the Marlon CS Longlife. Consequently much of the heat generated cannot escape and the temperature inside the building increases - this is known as the greenhouse effect. Buildings with Marlon CS Longlife rooflights or glazing retain heat at night as reflected infra red radiation is trapped. This is advantageous in horticultural buildings which are constructed with large areas of Marlon CS Longlife.