Let There Be Light is a feature documentary about the most ambitious experiment on Earth: the attempt to recreate the power of the sun. In southern France, scientists from thirty-seven countries are jointly building ITER — a machine designed to prove that fusion can produce more energy than it consumes.
Against that mega-project, the film sets the mavericks — inventors and small teams chasing the same prize at a fraction of the cost — following physicists like Mark Henderson at ITER and Michel Laberge of General Fusion.
Fusion has been “thirty years away” for half a century. Let There Be Light takes that running joke seriously and humanely, asking what it costs — in time, money and hope — to keep chasing a solution that could end our dependence on fossil fuels almost overnight. For the underlying science, see our explainer on fusion energy.