light box?
Oct. 26th, 2009 02:51 pmhas anyone here ever used a light box to combat the winter blues? i'm considering buying one but am not sure where to start for reviews, research, consumer recommendations, etc.
I'd also be interested in experiences with full-spectrum vs narrow-spectrum blue lights.
thanks.
I'd also be interested in experiences with full-spectrum vs narrow-spectrum blue lights.
thanks.
no subject
Date: 2009-10-26 06:59 pm (UTC)Right now I use the blue-LED kind. I have this one (http://www.amazon.com/Philips-GoLite-Spectrum-Therapy-Device/dp/B000C1946S), which seems to have been discontinued in favor of this one. (http://www.amazon.com/Philips-goLITE-BLU-Therapy-Device/dp/B001I45XL8) No complaints.
For reviews, I tend to do a web search for "[product name] reviews" — in this case, it would be "philips golite blu reviews." That gives me an idea.
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Date: 2009-10-27 01:25 pm (UTC)no subject
Date: 2009-10-27 08:27 pm (UTC)Call it practice.
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Date: 2009-10-26 07:04 pm (UTC)no subject
Date: 2009-10-26 07:40 pm (UTC)no subject
Date: 2009-10-27 02:10 am (UTC)Thanks so much.
Are there any light boxes for non winter blues?
Date: 2009-10-27 03:04 am (UTC)no subject
Date: 2009-10-27 03:15 am (UTC)I put it on a timer, so that it was sort of a replacement sunrise, and it made a massive positive difference in my life.
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Date: 2009-10-28 01:58 am (UTC)no subject
Date: 2009-10-28 03:22 am (UTC)no subject
Date: 2009-10-30 05:15 pm (UTC)Most of the published studies use "cool white" fluorescent lights—that standard ugly blue-white. A 1992 study* found no difference between broad-spectrum and cool-white fluorescent bulbs. (Note that the physics of fluorescence means that no fluorescent bulb can be full-spectrum, it can only be broad-spectrum at most—when something fluoresces it emits light at a single wavelength [well, several specific wavelengths].) It may be that there are additional benefits from broad-spectrum (or close-to-full-spectrum, which is possible with incandescent bulbs—though probably too hot to be practical), but for treating seasonal depression it doesn't appear to matter.
(I definitely dislike that color, but since no fluorescent light can be anything approaching full spectrum, I'm doubtful there's really a benefit to broad-spectrum fluorescent bulbs beyond esthetic and the better mood from less-ugly/more-natural-seeming light.)
What does matter is the brightness of the light and the length of exposure—most treatment failures seem to come from not getting enough light. The standard is 5000 lux-hours (e.g., 10,000 lux for 30 minutes, 2500 lux for 2 hours), though some people can do okay with as low as half that. Note that lux decreases as the square of the distance; lux ratings will be given at a particular distance and if you change that distance you'll need to change the time accordingly (e.g., 10,000 lux at 18" is only 5625 lux at 24" or 2500 lux at 36").
There's some very theoretical research indicating that blue light is what actually matters (and one study showing that blue light works better than red), but I wouldn't yet recommend the blue-only units that are starting to show up.
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*Bielski RJ, Mayor J, Rice J. 1992. Phototherapy with broad spectrum white fluorescent light: A comparative study. Psychiatr Res 43(2):167-175. [I'm pretty sure I read the whole article at some point and didn't note any problems, but I'm only finding the abstract now.]
thanks
Date: 2009-10-31 09:06 pm (UTC)