Read the article. While your correct, heating and a/c consumes far more energy relative to light.
I did read the article, and I've also read many other articles on that Indiana study. The key is that the study was done in Indiana. Similar studies need to be conducted in states with different climates, like Texas, Florida, Washington, and sourthern California.
For example, here where I live, during the summer, it is commonly still 90°F at 11:00 PM at night, and many times does not drop below 80°F at night. Many residential air-conditioners run nearly full-time. The springtime and fall are also much more temperate (neither heating or cooling is needed, so lighting becomes the primary energy consumer). I suspect the effect of DST on HVAC energy consumption in southern states to be quite different than in it is in Indiana. The effect may actually be opposite in different climates.
It would be stupid to base the decision on whether or not to continue DST on a single study that took place in Indiana.
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