Free spreadsheet-based tool. Sensor Placement + Optimization Software v.4.0 -- Version 4.0 includes spatial, spectral, and power curves for specific photosensor manufacturers based on the 2007 NLPIP Specifier Report on Photosensors by the Lighting Research Center. Additionally, SPOT™ v.4.0 includes daylighting metrics for both the USGBC Leadership in Energy and Environmental Design (LEED®) and the Collaborative for High Performance Schools rating systems, calculating compliance with required criteria and generating printable reports.