switch of lighting system
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What price you think is reasonable to install an automation lighting control system in a household with two rooms and a sitting room (around 4 gangs of light and 3 sets of light switch)?
如果要在一个两房一厅的家居（约四路灯，三组灯制） 安装自动化灯光系统，你认为那个价格比较合理?。
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