Am I using in "which in turn" correctly?

Question

The windows do not block out sun light which in turn causes problems such as glares, eye damage, and skin damage for students.

Answer 1

No, you are not using it correctly. Which in turn is a reactionary clause to an action, not to a lack of action. The windows don't actively refuse to block the light. Further, windows that block out all sunlight are walls.

The windows do not block out enough sunlight. This causes the students problems such as glare, eye damage, and skin damage.

Answer 2

A few minor corrections:

The windows do not block out sunlight, which in turn causes problems such as glares, eye damage, and skin damage for students.