For something that is positioned at L1 for an indefinite amount of time, with a large enough area to be effective as a solar shroud, it'll definitely have an impact.
That kind of shroud is effectively a solar sail without the ship attached.
“A journey will have pain and failure. It is not only the steps forward that we must accept. It is the stumbles. The trials. The knowledge that we will fail. That we will hurt those around us.
But if we stop, if we accept the person we are when we fail, the journey ends. That failure becomes our destination.”
That was such a captivating speech. Although he may have had some weak episodes (as does any Doctor), if you need someone to give a captivating direct, Capaldi's Doctor can't be beat!