Depends on setting--hospital vs. LTC.
No exper. in hospital. If we're talking LTC, where I worked, evening shift was much easier than days. (But, no, just answering call lights will never be all that needs doing on any shift.)
Day shift, you have to get residents up, wash them, and get them dressed. And get them down to breakfast, and lunch, and back, hand feeding those who cannot feed themselves, with toileting after both. Evening shift, only one meal; and putting residents to bed is much easier than getting them up, washed, and dressed, which is also pretty much done in the dark. Day shift was 9 hours (or more) of work which had to be accomplished in 8 hours. Evening shift, there was usually as much as an hour's break--in 5- & 10-min. increments.
Third shift, which I did not work, involved washing of all wheelchairs, and other cleaning & maintenance work, in addition to many call lights.