When you say “optimal timing” of light therapy, what do you mean? What makes the timing “optimal”?

A reader asks:  When you say "optimal timing" of light therapy, what do you mean? What makes the timing "optimal"?Answer: The timing...

I have always been a “night person.” I have children now and I bear the responsibility of getting them off to school in the...

A reader asks: I have always been a "night person." I have children now and I bear the responsibility of getting...

I think I have delayed sleep phase syndrome (DSPS). I took the Automated Morningness-Eveningness Questionnaire and got some interesting suggestions I’d like to try....

A reader asks:  I think I have delayed sleep phase syndrome (DSPS). I took the Automated Morningness-Eveningness Questionnaire and got some...

I am confused. A recent q&a item said that color temperature and spectral output matter. I understood your previous answers to suggest they did...

A reader asks: I am confused. A recent Ask the Experts answer said that color temperature and spectral output matter. I...

I have been tracking my migraines for years. I have clusters that go up in the winter and down in the summer. Jan.-Feb.-Mar.-Apr. are...

A reader asks: I have been tracking my migraines for years. I have clusters that go up in the winter and...

Does the effect of light therapy drop off after a while? I got great results (using all the wrong equipment and angles, not knowing...

A reader asks: Does the effect of light therapy drop off after a while? I got great results (using all the...

If I get a light box, will I have to take my eyeglasses off? They have filters to make them darker in the sun.

A reader asks: If I get a light box, will I have to take my eyeglasses off? They have filters to...

In the question on “the mechanism of action of the agitation side effect,” one of your suggestions was to try light later in the...

A reader asks:  In the question on "the mechanism of action of the agitation side effect," one of your suggestions was...

I have read that one needs expert professional supervision to synchronize the time of light exposure to your body temperature for effective light therapy....

A reader asks: I have read that one needs expert professional supervision to synchronize the time of light exposure to your...

I am getting fairly good results with a light box, but because of complicating factors, not as good as I would like. I am...

A reader asks: I am getting fairly good results with a light box, but because of complicating factors, not as good...

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