Mishnah Berurah — משנה ברורה

Needs to make a blessing - For we established that night is not the time for ציצית, and [therefore] it is an interruption. And there are those who argue on this, since a daytime garment is obligated [to have ציצית on them] even [when worn] at night according to some halachic authorities... and as is seen later in Siman 18... and [we hold that when there is] a doubt regarding a blessing, we are lenient (and we don't make the blessing). Nevertheless, it is proper to have in mind to exempt that [garment] with [the blessing that you make on] the טלית גדול. And all of this is as long as he didn't remove it (ie. the טלית that he slept in at night). But if he removed it with the intent to not wear it again soon after, he needs to make a blessing afterwards when he wears it... [and this is] according to everyone. Nevertheless, ideally it is not proper to do like this in order to become obligated in a blessing that according to all (authorities) [would be necessary]... because [it's] a blessing that's not needed according to those who exempt [ציצית at night]. One who sleeps during the day, an "afternoon nap"... and he removes his טלית קטן... there are opinions amongst the halachic authorities [that question] if this is in the category of "taking you mind off of". Therefore, it is proper that at the very least he should cover himself with it (the טלית קטן) while he sleeps... and when he wears it afterwards he won't need to make the blessing according to all [opinions].