Without opening blinds in schools, students are not receiving adequate vitamin D levels and are instead being subjected to dark rooms for up to 8 hours a day which is having a detrimental effect on their health.  Purely using electric lights are damaging to the environment as excess energy is being used whereas using natural sunlight is completely sustainable.  As well as this, schools are not taking into account pupils with seasonal effective disorders which can be severely damaging to their mental health.