The LEDs used on TT appear to be Grote units. As far as LEDs on mainstreet as of technology right now there is nothing comparable. When we were there last June there was a small section of those little lights on MS that had been switched to LEDs. Leds produce a different spectrum of light, what I mean is the main lighting on MS comes drom those small indicator bulbs used along the buildings. Leds dont produce enough visable light to get the same effect. Notice houses in your area with old fashioned miniature or C-7 lights used outside for Christmas lights and how much of the house and yard is lit up. Then look at a house with LED holiday lights. The yard appears much darker and the so does the house. They also have to consider what many have said is the most photographed structure in the world. LEDs also at times dont work well with digital cameras. As far as life expectantcy...the companys that make LED lighting gived these lights exceptionally long life times. However with my personal experience over time the "white" LED bulbs dim and do not produce the same light output as when they are new. Example....go to your local discoust store....Lets say Walmart, look at their display of christmas lights. Those lights when the first put them out in October were very bright. Now go back now that its December and open a new box and plut it in and you will notice a visable difference. LEDs have their place and I feel in time they will make one that will be truely a equal replacement for the incandescent bulbs but just not yet.
