Skyline with skyscrapers at night, on the left the Liberty Place complex, Philadelphia, Pennsylvania, United States of America. PHILADELPHIA - The lights of Philadelphia might not shine as bright in the coming weeks as a coalition in the City of Brotherly Love tries to prevent millions of migrating birds that pass through twice a year from slamming into skyscrapers and crashing to the sidewalk.Bird Safe Philly on Thursday announced the Lights Out Philly initiative, a voluntary program in which as many external and internal lights in buildings are turned off or dimmed at night during the spring and fall.The problem of artificial lights attracting birds to their deaths in the city is not new."We have specimens in the academy’s ornithology.