Seems your average semiconductor foundry needs around 100MW[1] to 200MW[2] of electrical power to operate. The main consumption is down to refrigeration chillers[3].

Average US house uses about 12600kWh per year[4], or 1.44kW average across a year. So that means one foundry takes about what 70k to 140k houses would take.

[1]: https://www.mckinsey.com/~/media/mckinsey/dotcom/client_serv...

[2]: https://www.theverge.com/2024/3/6/24091367/semiconductor-man...

[3]: https://www.sciencedirect.com/science/article/abs/pii/S02786...

[4]: https://www.eia.gov/consumption/residential/data/2020/c&e/pd...

The light source uses a lot of power to produce those few hundreds of watts of radiation

It is.