TL; DR

A new tech makes it affordable to keep warning lights on wind turbines switched off, unless a plane actually gets so close that the pilot must be alerted to the turbine.

This helps communities to become more likely to green-light turbine constructions, because it largely eliminates light pollution that allegedly threatens communities' "dark skies."

Previously, always-on warning lights triggered two of the "three deaths" that cause many substantial innovations to fail:

Some communities considered the lights "such a downside that turbines aren't worth it." And prior solutions to avoid the need for warning lights were "too expensive for turbines to be worth it."