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Solution looking for problem

Archive - Originally posted on "The Horse's Mouth" - 2011-03-27 20:03:57 - Graham Ellis

We've replaced the shower head in our bathroom, and gone for a rather fancy model from B&Q which will give high pressure jets, a haze of finer water, or both. Good - I like it.

And it has some LEDs which light up red when it's high pressure, green when it's a haze, and both when it's both:

 

Very clever ... but why?