Hmmm, lost my post.

Isn't this getting a little late in the summer to be asking about summer sunshine? Time to talk about winter RAIN.

Anyway, I wear jeans a lot, on the bike, off the bike, around home. Thus leaving me with pasty white legs

I started experimenting with bike shorts some this summer, and oddly I was able to ride all day, sometimes with suntan lotion, sometimes without it. I never burnt the legs, and never saw any sign of a tan. I've wondered if the high energy use and blood flow from cycling reduced the tendency to burn (and, of course, constantly moving sun exposure).

There are a number of manufactures and models of bicycling tights/knickers/capris. Full length, and 3/4 length (just below the knees). Both in bibs and regular (padded) shorts/pants style.

https://www.rei.com/c/cycling-tights

That would seem like some of the best sun protection for the legs.