Therapy Light Rooms for Improved Sleep in Dementia Patients

Inclusion Criteria: * 60 years or more of age and in long term care (longer than 4 weeks) * have dementia in accordance with DSM-V * have either sleep/circadian rhythm disturbances, BPSD as identified by NPI-NH, or severely reduced ADL function * provide written informed consent if the participant has capacity, if not, a written proxy informed consent from a legally authorized representative Exclusion Criteria: * are blind or may otherwise not benefit from light * partake in another trial * have a condition contra-indicated to the intervention * have an advanced, severe medical disease/disorder and/or expected survival of less than 6 months or other aspects that could interfere with participation * are psychotic or have a severe mental disorder