Thatís good advice and a good point, which set my mind wondering.
I was standing at the upstairs bedroom window in the twilight, looking down into the back garden, and I noticed how bright the solar-powered lights were, running along the path. Then I wondered how easy it would be to have similar lights on the inside of every window in the house, even just sitting on the windowsills, so that when darkness set in, they would automatically switch on, but if not needed, they could be switched off and saved until needed. This simple idea would save energy and possibly accidents from occurring in the home.
The idea could be extended so that solar-powered cells could lead via wires down to lights in dark places like cellars, or up into attics.
Sunlight might also be fed indoors via fibre-optic cables to dark indoor areas; in case youíre wondering, these cables would not transfer heat from the sun, as infrared light does not travel through them.
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