I've never ever heard of this.
According to Cosmo, the blue light from your tablet screen, computer and phone is just as bad for you as the UVA/UVB rays from the sun.
Dermatologist are recommending you wear a mineral based sunscreen, indoors to help prevent early signs of aging and dry skin. The mineral based sunscreens are apparently good at blocking light damage on your skin! (Cosmo)
