There’s a Friday night dress rehearsal for the Sound-Transit sponsored art installation in the empty lot cleared for light rail construction at the corner of Broadway and Denny. Word from the artist Dan Corson and Sound Transit art program manager Barbara Luecke is the ‘rehearsal’ will start at 7 PM and run ‘until the generator gas tank is empty’ around midnight. Same plan Halloween night. There’s been some scrambling to complete the installation as weather and some mis-sized fiberglass rods have slowed progress. The installation isn’t yet in final form but most of it is in place and there are lasers. What else could you ask for?