And there are a lot of researchs that are linking all the modern illnesses with artificial light and claiming that light hygiene and nature contact is far more important that diet, exercise, etc. (heating is not better also). So we waste so much energy for heating and lighting and it actually make us sick, which is a new waste of energy.. I am a fan of dr Jack Kruse
I don't really know what to say here. I think every human reacts differently. But one thing is certain - we all need sun (daily is the best choice, but we can not choose the weather), fresh air, and main exercise like long walk or running. About artificial light and heating... I don't have a real comment here. But at least I know that without heating, you wouldn't casually walk in your apartment or house - not during the classic winter, here in central europe. We waste a lot more energy than 100 years ago. And if we want to fill our demands, there has to be certain amount of energy for work and/or free time. Way of life is changing. If you want to make money and heat your place in the same time...I have an idea for you. Mine cryptocurrencies. Google it....