Light to fight addiction

INTERVENTION: One group (intervention group) will receive behavioural instructions (about sleep‐wake timing) combined with a lighting intervention aimed to facilitate adherence to these instructions and to increase self‐control and mood during daytime, while the other group (placebo group) will only receive behavioural instructions with standard light settings. The lighting intervention will consist of dawn/dusk simulation, combined with a higher intensity level during daytime and gradual dimming in the evening in the living room and bedroom. CONDITION: chronic alcohol dependency PRIMARY OUTCOME: The main study parameters are self‐reported number of drinking days, number of alcoholic drinks consumed and alcohol craving SECONDARY OUTCOME: Sleep timing, duration, and quality, degree of circadian (mis)alignment, self‐control with respect to resisting alcohol, vitality, mood, quality of life, and adherence to behavioral instructions INCLUSION CRITERIA: In order to be eligible to participate in this study, a subject must meet all of the following criteria: Patients should be under current, active treatment of the FACT team, with primary alcohol dependence, capable of adherence to agreements with FACT team (based on a maximum of 30% of not showing up for meetings at the clinic or being at home for home visits by caregiver), and are aged 24‐65 years old. Moreover, they should be fluent in the Dutch language.