The morningness-eveningness questionnaire (AutoMEQ) indicated my melatonin onset as 9:45 p.m. and my ideal light therapy session time as 6:30 a.m. I usually sleep...

A reader asks: The morningness-eveningness questionnaire (AutoMEQ) indicated my melatonin onset as 9:45 p.m. and my ideal light therapy session time...

Would light therapy be effective for a person who is totally blind? Some people with blindness seem to have mood swings with the seasons....

A reader asks: Would light therapy be effective for a person who is totally blind? Some people with blindness seem to...

My goals are to regularize my sleep-wake cycle and treat some mild but persistent depression. At your suggestion, I took your Automated Morningness-Eveningness Questionnaire...

A reader asks: My goals are to regularize my sleep-wake cycle and treat some mild but persistent depression. At your suggestion,...

My 16-year-old daughter is perpetually tired, even though she sleeps well and gets plenty of it. She goes to bed at 9 at night...

A reader asks:  My 16-year-old daughter is perpetually tired, even though she sleeps well and gets plenty of it. She goes...

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...

Most of the equipment referred to by your questioners, as well as that sold for depression treatment, uses fluorescent tubes. Have incandescent sources been...

A reader asks: Most of the equipment referred to by your questioners, as well as that sold for depression treatment, uses...

In dawn/dusk simulation therapy, how important is the dusk simulation part? Also, can dusk simulation be successful even if used at different times in...

A reader asks: In dawn/dusk simulation therapy, how important is the dusk simulation part? Also, can dusk simulation be successful even...

I have been suffering from chronic insomnia for several years. I have seen every doctor and tried every medication (both prescription and herb) imaginable...

A reader asks: I have been suffering from chronic insomnia for several years. I have seen every doctor and tried every...

I’m using a light box (10,000 lux) for 30 minutes at 7:30 each morning for depression and to help me get up at a...

A reader asks:  I'm using a light box (10,000 lux) for 30 minutes at 7:30 each morning for depression and to...

I have recurrent ocular herpes for which I take Valtrex every day. Are there any concerns that light box therapy can exacerbate it?

A reader asks: I have recurrent ocular herpes for which I take Valtrex every day. Are there any concerns that light...

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