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Old October 2nd, 2015, 11:26 PM   #81
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Originally Posted by keber View Post
It's not that long (about 350 m I suppose). Imagine having that in 5+ km long double tube tunnels, cost would be enormous.
If it's anything like ships lighting (what I do for a living) the cost would be covered in about 18 months. The big savings are energy and maintenance, a typical industrial LED will have a working life from 50-100,000 hours L70. Re-lamping in tunnels often requires shutting down the tunnel.
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Old October 2nd, 2015, 11:26 PM   #82
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Originally Posted by Rob73 View Post
This is incorrect
It was correct almost 5 years ago, when I wrote the original post.
I agree, LED lights made huge progress recently and they are installed almost everywhere now. Even my apartment has exclusively LED lightning.

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Old October 5th, 2015, 05:29 PM   #83
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LED lighting is the future.

Within the next few years, old school halogen and mercury lights will be history (similar to what is happening with how incandescent lights were replaced by fluorescent bulbs......which are being replaced with LED bulbs)
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Old October 26th, 2015, 02:17 PM   #84
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Does your city has solar-powered LED lights? If yes, are they reliable?
Which one would you prefer?
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