"wayne" wrote in message
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They are solar powered UV hour meters, that count the hours it is exposed
to UV radiation.

I don't know what I would do with that information. I don't think many
certified aircraft are affected by UV radiation. It may fade the interior,
but a cabin cover will solve that.


Also: How about a Universal Low Fuel Warning System! ...
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Every vehicle without a fuel gauge could certainly use one of these.

I'm pretty sure a fuel gauge is required.

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