Title: Keeps the circadian clock regulated but does not help SAD enough
Product review: I bought this after using the day light uplift for several months and having only partial response. That light actually filters the blue spectrum and is not very effective for regulating the sleep clock. This light helps the sleep cycle but does not really help mood directly. What I am realizing is there are different kinds of SAD. Some which are more sleep clock related and some which are more neurotransmitter related or some other mechanism which bright light effects, but this blue light does not. Perhaps the qi field or third chakra. In any case, I use this light along with a bright white light for a few hours a day and am SAD free. This light alone did not prevent changes in mood at all for me. It does keep the sleep cycle on schedule with just 15 mins of use in the morning.
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