@StumpTownStu
I am not questioning how much more efficient or more reliable they are.
I get that they are. All of the studies show the LEDs last 20-50 times longer. I am not disputing that. Even if that is in a lab environment, that is still a tremendous difference. That is why I rounded down to a middle ground of 30 times longer. Due to issues with the electrical systems not being recently upgraded or clean, etc.
I have never seen a study saying they are 'designed to fail'. But even so, the savings is clearly there due to length of time for replacement.
I get your point about a household use and savings being minimal. But I do not even question that. Of course, it will add up over time. Of course over a vast grid it will add up more and over a nation even more. Every little bit helps.
The savings are far bigger in a business or facility than a household, I get all of that.
For example, some years back I had occasion to visit a large-scale aerospace manufacturer. It was a 'newer' facility so not an older place. But it had the big old bulbs. These are always going out and the maintenance guys simply replace them from time to time. Some places will replace them as they go out and some will wait until there are a few to replace at once.
Going through the place you would see the guys replacing them sometimes.
I got to know the head facilities manager pretty well. I noticed one day they are installing a big square fixture in place of one of the big bulbs. I asked him what his guys were doing. He said they were upgrading to the LED as a cost-savings as the older bulbs blew out.
Then one day I am there and notice they are doing all of them and not just the random blown ones. I asked him why he was not waiting on them to blow like before.
He told me that he had decided to go ahead and replace all of the ballasts and install all LED lights.
I asked him how long it would take to make that up considering he was 'wasting' some bulb that were still good.
He told me he would easily recoup the costs by the end of the year. This was like early springtime or so.
The place was broken into quadrants. So, pretty much the whole quadrant had to be lit up if anyone was working an off shift even in a small segment of the quadrant.
He even had a PLC touch panel installed at the security desk where whole quadrants could be turned off when not being used. Then in the quadrants that were being worked in, you could select only certain rows of lights to be used.
He said that the LED were so much cooler than the older bulbs that they would save a large amount on cooling costs during the summer time. He said the older bulbs made the facility around 2 degrees warmer.