Douglas County (CO) Public Library has installed a Sundolier device – donated by Sunflower Corporation. What it does: device on the roof tracks the sun as it moves across the sky with two gears: one for azimuth and one for elevation thus works in summer and winter as sun angle changes. It focuses 4x the sun’s light into one point in the building which is then distributed through the building lighting up about 1500 sq foot of space using only the same amount roof penetration that a regular skylight would use. It saves money and creates healthier, happier, and a more productive environment with the use of natural sunlight. It’s totally self contained, no electrical connection, and uses photovoltaic power. Watch this video or visit the green section of their Web site for more information.
Going Green @your library 