I think that is a system generated link, by viglink, not added by the poster... just another form of advertising.
And I think I am aware of the product... It may be considered a very low level of light... but things like Anubias, Bucephelandra, Moss and ferns will grow if attached to decor. Crypts and other low level plants may work planted in the substrate, but further away from the light will mean less to assist growth, so they will be slower to grow.