Spero has helpful engineering information available for fast downloading.   We have compiled a complete library of photometric data files.   Files are available in standard IESNA 95 format.  With large format plots and the latest 3D computer modeling technology we give you an edge for any presentation.    Project turn around time averages 24-48 hours.   For ballast testing and operation reference see our ballast troubleshooting guide.   Should you need further assistance please call us at (330) 995-3050 or Email info(at)sperolighting.com.