***** To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy ***** You could try Tetraspeck microspheres from Invitrogen (T7280). These have 4 dyes in them across the emission range you require. Dan Metcalf National Physical Laboratory Teddington UK -- View this message in context: http://confocal-microscopy-list.588098.n2.nabble.com/broad-spectrum-beads-430-600nm-emission-tp7503979p7505408.html Sent from the Confocal Microscopy List mailing list archive at Nabble.com.