Aging is a natural process and fighting it by blocking out the sun completely sounds like overdoing it, MJ130 (no offense, of course). You *will* see aging eventually.
Sounds to me like your parents are aging excellently even with lots of exposure. That should give you a sign that you have "good" genes in this regard and that exposure to the sun is not a problem for you.
You'd probably be fine with just a regular blackout screen to make your room dark at night.
I've always been very sensitive to the sun - pale skin, easily sunburnt, yet I'm now 36 and think I show fairly normal signs of aging.
I am not saying you are *wrong* in taking precautions, but I would argue that you would be MUCH better off just enjoying life and the natural processes we are a part of, rather than fight them with fear. SPF 70 is a bit over-the-top, perhaps.
Have you talked to a dermatologist about this?
