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LED knowledge

Title Hits
What colors are LEDs available in commercially? Hits: 4578
Are any large cities using LED traffic lights? Hits: 4128
What are the major variables in determining savings? Hits: 4336
How much money is saved over the lifetime for switching out a red light with an LED? Hits: 4278
How much money is saved over the lifetime for switching out a yellow light with an LED? Hits: 4104
What is the payback time and return on investment for yellow LEDs? Hits: 4293
How much money is saved over the lifetime for switching out a green light with an LED? Hits: 4307
how much carbon dioxide emissions are prevented by switching to LEDs? Hits: 4126
How much pollution is prevented switching an average intersection to LEDs? Hits: 3971
Is there any reason not to switch to LEDs? Hits: 4099