The patent-pending HOBO UX90 Occupancy & Light Logger tracks building occupancy and light usage to pinpoint areas in a building that could benefit from occupancy sensors and other energy savings initiatives. Compact, the data loggers are easy to mount to lighting fixtures, ceilings and walls, and set up in less than a minute. Once recorded, data can be viewed in graph form using HOBOware software, printed, and/or exported to Microsoft Excel. Prices range from $85 to $224. ONSET COMPUTER CORP., Bourne, MA. (800) 564-4377.