LDI Show XLIVExLDI Digital Signage Experience Concerts Installations Theatre Gear Lighting Projection Sound Staging XR News Resources Training Project in Focus Xlive Events Subscribe Subscribe Concerts Installations Theatre Gear Lighting Projection Sound Staging XR News Resources Training Project in Focus Xlive Events Subscribe LDI Show XLIVExLDI Digital Signage Experience Register today: Applications are open for the Pat MacKay Diversity In Design Scholarships Lighting GLP Introduces impression X4 L And More At LDI By Marian Sandberg Sep 30, 2015 7:30pm News Mark Ravenhill, president of GLP US, demonstrates the key features of the new impression X4 L, available for demos at LDI. News