Based on comprehensive authoritative sources, here’s information about hamsters' daily sleep duration:

Core Data
Basic Sleep Volume
Approximately 12-18 hours per day, with most falling within the 12-14 hour range.
Exceptional Record
Individual cases have shown sleep durations of up to 14 hours and 25 minutes.
Sleep Characteristics
Circadian Rhythm
Main sleep period occurs during the day (especially 7:00–20:00).
Active at night but wakes intermittently for short periods to forage.
Sleep Patterns
Predominantly light sleep; each deep sleep episode lasts only about 11 minutes.
Often sleeps in relaxed postures like curling up or lying on their back.
Notes
Avoid frequent daytime disturbances, which may trigger stress.
If sleep time extends abnormally (e.g., over 20 hours), monitor for health issues.
(Note: Data variations may relate to hamster breed, age, and observation methods.)