The paper presenter, Robert G. Kennedy III, proposed building “Dyson Dots” – a much smaller version of a conceptual swarm of solar collectors proposed by physicist Freeman Dyson to capture the entire energy output of a star, now called a “Dyson Sphere”.

These “dots” would consist of multiple reflectors and block an area approximately 386,000 square miles (over 1,000,000 square kilometers) in extent, nearly the size of the state of Texas. The reflectors would be placed near L1 to ensure a stable orbit. At this distance, the Dot would reduce the amount of sunlight (insolation) the Earth receives by as much as one-quarter of one percent. Is that enough to make a difference? Kennedy and the other members of the HELIOS team think so.

“This reduction would bring down Earth’s average global temperature by as much as 2.7 degrees Fahrenheit (1.5 degrees Celsius), approximately the same change that brought about the “Little Ice Age” (approximately 1550–1850 C.E.).”

https://www.spaceflightinsider.com/missions/commercial/researchers-investigating-large-sunshades-combat-global-warming/