dnd 5e – Can the Ring of X-Ray vision prevent Shadow Step?

The Ring of X-Ray vision states:

To you, solid objects within that radius […] don’t prevent light from passing through them.

The Way of the Shadow Monk has a level 6 feature that states:

When you are in dim light or darkness, as a bonus action you can teleport up to 60 feet to an unoccupied space you can see that is also in dim light or darkness.

Say a Shadow monk is inside of a wooden crate with 1 inch thick sides. The crate itself is on a wagon in bright sunlight. Within 60ft of the crate is a tree creating an area of dim light.

If the Shadow Monk activates the Ring of X-Ray vision would they be in darkness for the purposes of using Shadow Step?

Prompted by this question which focuses on how the ring affects the appearance of a dark area. My question is interested about the “reality” of the darkness/illumination.