Bronze Harvest

Following the end of the Great War, the Bronze Harvest represents the future of the Cybertronian race, harvesting Luna 1's one billion spark hot spot.

Fiction

2005 IDW continuity

When the Cybertron of the Functionist Universe threatened the main reality, Team Rodimus hatched a plan to defeat the Functionist Council by exploiting Vector Sigma's connection to the hot spots. The Unremembering When a duplicate of the Matrix of Leadership was opened at each hot spot, Cybertron shunted the energy surge to the orbiting Luna 1, reigniting the hot spot. A Spark Among Embers

Though it was initially questioned whether Cybertron had enough energon to support the reignited billion sparks, by the time of Ratchet's funeral, half of the "Lunarians" had been brought to term and successfully integrated into society in what had been dubbed the Bronze Harvest. How To Say Goodbye And Mean It: Part 2