NOWA SLIM LED CEILING LAMP Pre-Set Button Version -- Change color before install CCT Changeable by Switch Version--Change color after install *Make one stock for variours needs. *Control your lighting by easy procedures. *Switch on and off 8 times to reset to 4000k. *Change color temperature by switch on and off within 1.5s. *Three size options:250mm/300mm/400mm *Excellent waterproof rating IP54 After picking her son up from school one day, the mother asks him what he did at school.