Complex sentence: Nearly a full year later, the chandelier was returned and raised in the capitol with the additional restoration of the upper lights, which were turned-off for four decades due to the damage the light caused to the mural above.
Split into simpler sentences: Nearly a full year later, the chandelier was returned and raised in the capitol. The upper lights were also restored, after they had been turned off for four decades due to light damage to the mural above.