Cambridge s millennium light celebration unites their talents for the first time for a unique collaboration. For Common Light , Spectaire combined the technology of 300 million candlepower spinning skytrackers and 800 million candlepower World War II carbon arc searchlights in four spectacular events. In January, Spectaire presented The Beaconing , accompanied by the ringing of church bells. In May, the City celebrated the spring with a Light Parade of drummers, masked performers and lights parading down a three-mile stretch of Massachusetts Avenue. In September, Spectaire presented a grand finale to Danehy Park Family Day, uniting light and music for Skyward Light .
All events are free and open to the public .