The National Capital Commission has recently approved a large digital outdoor sign on the side of the new convention centre, to be on display from 6 am to 11 pm every day once it's installed. If you think this is unnecesssary light pollution and unsuitable for Ottawa Centretown and the area adjoinng the Rideau Canal, you can sign the petition here.
Read more about this issue here.
Read the staff analysis and the pilot program that the NCC approved at its June 2011 board meeting here.