I used a light box for about 10 days, and ended up experiencing anxiety and irritability, even after cutting back on the time of...

A reader asks:  I used a light box for about 10 days, and ended up experiencing anxiety and irritability, even after cutting back on the...

If I am using light therapy to combat depression, and doing so resets my clock earlier …

A reader asks:  In the answer to question #1498 you wrote, "This is the time interval during which you can most easily reset your clock...

I bought CET’s recommended light box in early November and can’t even begin to describe what a wonderful addition to my life it has...

A reader asks: I bought CET's recommended light box in early November and can't even begin to describe what a wonderful addition to my life...

 I have been treated for major depression and bipolar disorder for several years, with different medications, but with no significant relief! Recently, I purchased...

A reader asks:  I have been treated for major depression and bipolar disorder for several years, with different medications, but with no significant relief! Recently,...

My husband and I practice natural family planning using the sympto-thermal method. Charting my waking temperature at the same time each day is important...

A reader asks:  My husband and I practice natural family planning using the sympto-thermal method. Charting my waking temperature at the same time each day...

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 interesting suggestions I'd like...

 Having been diagnosed with adult attention deficit disorder (ADD) and depression, I have been on medication for both but feel worse during the winter...

A reader asks:  Having been diagnosed with adult attention deficit disorder (ADD) and depression, I have been on medication for both but feel worse during...

I am looking into light therapy, not so much because the days are short, but because I work in a place with no windows....

A reader asks: I am looking into light therapy, not so much because the days are short, but because I work in a place with...

If I buy a small light box with less lux output, is it simple math to adjust my sessions — for example, half the...

A reader asks:  If I buy a small light box with less lux output, is it simple math to adjust my sessions -- for example,...

In answer to another person’s question, you said, “Waking up to bright morning light, whether from outdoors or timed artificial light sources, is far...

A reader asks: In answer to another person's question, you said, "Waking up to bright morning light, whether from outdoors or timed artificial light sources,...