Wow, at my hospital, call lights are priority. The patients trays will be fine sitting for a minute, but like you said, what if someone fell because no one answered the call light on time? Or what if a patient was having an emergency like chest pain or an asthma attack? Delaying answering call lights puts the patients in danger. Do you have an employee handbook that gives you guidelines for patient care? Can you ask management which takes priority without specifically saying the other CNA told you not to answer the lights?