Performance > Tubular Skylight Light Output and Reflectivity Rate
How Bright Is the Light From A Tubular Skylight?
Natural Light Tubular Skylights illuminate the equivalent of up to 300 to 1,450 watts of incandescent lighting varying on the model installed (see chart below), but without the heat gain of traditional lighting. Additionally, Natural Light Tubular Skylights filter out 99% of the harmful UV rays that fade furniture and carpeting. And because they operate using free solar power, Natural Light Tubular Skylights are energy efficient and will help reduce your electric bills!
Natural Light Tubular Skylight Output Chart
|Model Size||Coverage Area||Wattage Equivalent||Max. Tube Length|
|10" model||up to 150 sf||up to 300 watts||18 feet|
|13" model||up to 300 sf||up to 500 watts||20 feet|
|18" model||up to 500 sf||up to 1,000 watts||20 feet|
|21" model||up to 700 sf||up to 1,450 watts||20 feet|
Natural Light Tubular Skylights Are Engineered to be the Best!
The main component of the Natural Light Tubular Skylight is a super reflective, mirror-like light pipe with a 98% reflectivity rate. The entire length of the pipe's interior is coated with the reflective surface that is responsible for bouncing sunlight several times as it travels through the tube. This material, called Miro-Silver®, is used on all Natural Light Tubular Skylights. Miro-Silver has been rated one of the best in its category.
Miro-Silver® versus Multi-layer Polymeric Film (MPF)
Many other tubular skylights use a much thinner, less reflective material called Multi-layer Polymeric Film (MPF). A series of tests were conducted comparing the Miro-Silver light pipe to the more standard Multi-layer Polymeric Film (MPF). The test's purpose was to measure the amount of light reflected at different times of the day - particularly when the sun's angle is low and light is really needed (early morning and late afternoon).
Light reflection measurements were taken with the sun's angle at 13.8 and 40 degrees on a 10 foot long x 12" diameter tube. The test results prove that Natural Light's Miro-Silver light pipes transmit much more light between 13.8 and 40 degrees than the standard Multi-layer Polymeric Film.
Natural Light Miro-Silver® Light Pipe Advantage Over (MPF)
|13.8°||98.16%||40 reflections||+78% advantage|
|40.0°||98.22%||11 reflections||+17% advantage|