MAY 03

I think one of the best energy-saving initiatives regarding lighting would be to switch off all street-lighting on motorways (Highways) after a certain time, as they won't be heavily used and it also adds to light pollution. Having street lighting on all night is a relatively recent thing and I'm not sure it's strictly necessary (aside from pedestrian areas, and perhaps accident blackspots).

light-sensors at home would only work in combination with motion-sensors, otherwise they would always be on in the dark even if nobody was there. and light switches will be necessary to turn of the light when you want it to be off (for whatever reason)

as for the sensors in streetlights: I love the idea. last night I was trying to go to sleep and the moon was shining into my room and I was surprised at the amount of light it put off! but do the production (and environmental) costs of making and installing all those cells weigh up to the advantages?

"but do the production (and environmental) costs of making and installing all those cells weigh up to the advantages? "

With this idea you really dont need a very large cell at all. You arent trying to generate electricity from moon light, you are only trying to determine if there is moon light. The photovoltaic cells would be smaller than a cell phone and relatively cheap.

I also like your idea of the motion sensor. I was trying to think of the best way to determine if there was a car on the road, but I think that might be the simplest. I was thinking of either sound detector or IR scanner. If it senses something it will light up the lights for a 1/4 mile or something. We'll let the experts determine the best distance it should be.

There were a few other submissions to this contest that were also very cool and related to lighting. One was Brightwalk which is a shoe that emits light as the wearer walks/runs, another I liked as PowerLeap which I think is a floor that lights up as people are walking on it.

I have no idea why this hasn't already been done.
It's a known fact that a lot of power goes to light at night, and it's not always necessary.
You don't need to be Einstein to think about it..

but my query is when exactly were the light sensitive lamps we have now, were invented?

ideal for street lighting. Is this only a concept or have anyone already implemented ? if yes where can we get those sensors

There are a shrewd fine for many cities around the world. Set up is prompt, regularly minus than a day per solar street lamps light. It is very important properly to amount the light from nightfall to emerge. Solar energy is worn to custody the solar street lights series during daylight and at night, the capacity free by the array powers the light. A timer or a photocell joystick the function of the grid. When installing solar avenue light, there is one of the principal definite expenditure for parking oodles, parks, highways, roads airports, section lighting and adopting solar lighting technologies dramatically reduces electricity outlay and green house emissions. Street lighting is no should for excavation to the geographic district.

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It's very good, why not get it from sun, what's you want you can earn.

Moon Sensitive Street Lamps Could Save Gigawatts
very interesting,I like this.