Still not cost effective... 200k to save 32 K

I changed out the bulbs in my hose... Cost  was 35 bucks a bulb vs a regular 100W $2.50 bulb ...  

I will never live long enough to see any savings in my electric bill.. I can't measure the saving because it is so small at the residential house hold level ... 

In reality the actual LED light and fixture  plus labor for 3 workers  (at $150/hour two changing the bulb + flagging traffic?) and equipment costs really run the cost up.

Est cost of 1 LED light and fixture $100 each 
2 hours labor $300
Equipment cost $20 dollars  per change out.

I will bet the total cost is close to $400+ for everything

That is why the Mayor is talking about millions.