For us non taxpaying (there are more of us older non income taxpaying folks than you realize check with the IRS, I paid my share many yarn ago). Remember the Galactica.
LED won't pay for itself if you are replacing a working CFL, at least not for a long time, or you have a VERY high electric rate. I wait until they fail then change them. We went through this at work a couple years ago too...they changed over to CFL's, then a few years later the big LED push came through and they wanted to "upgrade" everything, and were pushing hard for it (management) I went through and did the math on the various buildings...many of them normally only have the lights on for a few minutes per day, and replacing the working bulbs would never (literally, never) pay for themselves...they backed off then...still had to replace all the bulbs in the more commonly used buildings.
If you have many on for a long time it will pay off. It would not be unusual for there to be 10 lights to be on for 10 hrs a day between the sewing room and kitchen, rates not cheap here in Maine.
I happen to live in the state with the 2nd highest electric rates in the country, so LED change outs work well. There are a few lights that I didn't change out just because they are rarely used (closet and bedroom lights)My town put in all LED lights last year (voters elected to spend the money). Electric bills are coming in so low that it will take 2.5 years for ROI. But if you have cheap electric, I can see where that wouldn't' work so well and wouldn't make sense.
