I live in sunny California but I still have problems with not enough sun. I used to be a cyclist and triathlete, being outside for many hours a week, and now I

I live in sunny California but I still have problems with not enough sun. I used to be a cyclist and triathlete, being outside for many hours a week, and now I am doing maninly dancing. I am inside way more than I used to be. I can feel when I need more sun. Incedentally, I also had a recent physical where they measured that I had a vitamin D deficiency. They said a lot of interesting things in this article related to the sun, so I leared some new things. At the same time I am surprised about some things they did not say. I'm not an authority on the bodies need for sun, but I will give my non-scientifci observations. If some one finds this interesting they should do some additional research on the topic before they do anything I did, rather than just trust what I write here. One thing that really interested me was an article I saw here on Hacker News a several months ago. It said it is well known people with higher vitamin D levels had some health bvenefits. However, one particular study found that giving vitiamin D supplements did not seem to give the same health benefits. The authors concluded from their results that people who have high vitamin D often get this from the sun, and the sun gives them a different result from just taking vitamin D supplements. I tried going to a sun tanning salon and found that did make me feel a subtle "high", as if I had been out on a sunny day. (Your experience may very.) From what I understand it is UVB that is responsible for this, the "bad" UV. It is considered bad because your body does not shield against it and it does not cause you to tan. General tanning salons want to give you UVA. The expensive machines limit your UVB exposure, and the cheaper ones give you more UVB (salons often have different options for beds). You want to go to the cheaper option. I used beds at tswo salons with 5% and 6% UVB, for reference. They should know the UVA/B statistics for the machines. As far as length of time, you don't need to go that long. The point is not to get a tan necessarily. I found that i would get more tired if I stayed in too long, so there is sort of an optimal time, for me at least. (I am very pale, by the way.) I also noticed that the sun tanning bed was not enough. It is almost as if there are two effects. I feel good from the tanning salon, but at the same time it feels like there is something missing. I also need to go outside, I assume to get visible light. To repeat above, these are not scientific results. I find this seems to work for me, and that is good enough. I would not suggest someone trust what I say here as authoritative, but hopefully it can be an inspiration to look into this if you have similar problems. FYI, one thing I want to look into as a result of this article is timing of getting visible light. I do know that if I wake up in pitch black I have trouble getting out of bed. I would link to get more bright light in the morning right when I wake up and see how that effects me.