Ed Pignone, executive director, Old North Foundation of Boston, holds a an incandescent light, Friday, Feb. 29, 2008 that has now been replaced by LED lights at the Old North Church in Boston. The Old North Church has gone high-tech, installing light-emitting diodes, or LEDs, to illuminate ceiling vaulting inside the church where two lanterns were hung the night of April 18, 1775. (AP Photo/Lisa Poole)

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