5. Conclusion
The present study demonstrated that a self- luminous light table was an effective and practical method to deliver circadian light to improve sleep, mood and behaviour in indi- viduals with ADRD. Two related features of the light intervention probably led to the successful outcomes: (1) the self-luminous light table has the potential to deliver an amount and a spectrum that can strongly stimulate the human circadian system (CS values above 0.5) and (2) the self-luminous light table can be very effective at delivering light to individuals with ADRD because they were commonly observed sitting together around a table with their heads tilted down. Recognising that the light delivery method is one of the biggest challenges for successful light treatment, the self-luminous light table tested here is probably a highly effective and practical way to improve sleep and reduce mood disorders for individuals with ADRD living in controlled environments or at home.