Unlike
louvers with a specular finish which reflect light, lenses refract
light. The direction of incident light changes as it passes through a
lens. Although the majority of light is directed downward within a
given distribution, a portion of the light is refracted into the higher
angles.
Prismatic Lenses will display more of the light source's brightness
than specular parabolic louvers. This additional brightness will tend
to brighten the ceiling and upper portions of adjacent walls. Lenses
are most appropriate when brightness and economy are desired and where
visual tasks are not being compromised.
Prismatic Lenses are without a doubt the industry standard light
control media. They provide unequalled economy and efficiency but
provided only limited control of light distribution. For areas where
brightness and a wide light distribution pattern are valued Prismatic
Lenses or Eggcrate Louvers are an appropriate choice.
