Light delight

Interesting though the next- generation light source is (Feature, 18 September) I wonder whether it will ultimately have the many applications promised. These types of projects are a scientists' delight and they need to talk about the 'real-world' uses to get funding. but ultimately they are giant laboratories, not industrial facilities.

There is also much international one-upmanship attached to them, hence we are warned that if we don't build it the Americans/ Japanese/French will.

D Harmer, Sheffield

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