Higher spf baby sun screan

So my son had my skin tone.... porcelain (literally that’s my foundation name) my son has an SPF of 50 but he is still getting burnt he is getting reapplied once an hour and in the shade... I use spf 100 but after 27years I don’t burn as much now that I’ve been burnt so much growing up. We have a family history of skin cancer and other genetic cancer so it’s a constant fear.

Does anyone have a higher SPF or better sun screan? We just changed from the babygenics ( read about the hormone imbalance that’s possible when to much is absorbed) now we use Hello Bello.

Thank you in advance (pic of my cuties for attention)