OSP (IMAGE) Rensselaer Polytechnic Institute Caption Developed as a practical system for assessing outdoor lighting performance, the OSP method can be used with any commercial lighting software. Using this software, the designer establishes a calculation "box" following the natural division between a public and private space, the property line. The top of every calculation box is set at 10 meters above the highest luminous architectural element on the property, or the highest point on a building that might be illuminated with flood lighting. Credit Rensselaer/Lighting Research Center Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.