[quote]Dopamineloveaffair wrote:
I have some experience with SAD and light boxes.
Light boxes have nothing to do with synthesizing vitamin D. Light boxes emit no ultra-violet rays. The light from light boxes are around 100x more powerful than regular lights you may have in your house, so give up on the idea that you can make your own cheaply. A good quality light box will run you between $200-$400.
Vitamin D supplementation helps SAD via a differant mechanism. Basically light from a light box slows down the release of melatonin from the pineal gland. Melatonin is a sleeping hormone among other things. Science has revealed it has many interesting functions. But for our discussion you can think of excess melatonin creating an artifial hybernation mode for people that are susceptable.
The long and short of it, light boxes work, so does vitamin D. Both methods in combination are best. For some people it still isn’t enough, and antidepressants may need to be prescribed on top of this.
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They are not 100x, or any significant amount, more powerful than regular lights. If this were the case the light would be unbearably bright. If you argue that the case it is in dampens the light so it is bearable, well that would decrease your exposure to the light and in practice would not be any significant amount more powerful.
As far as using regular lightbulbs, you bet your ass it works. Those SAD lighting systems use fluorescent bulbs, which are the same ones you can get at most stores. Outside of fluorescent bulbs, any full spectrum lighting would be fine, be that special tungsten lights or halogens.
Melatonin production can be influenced by any light source, be that a bright enough flame, sunlight, full-spectrum, white, yellow, etc. While all colors will affect melatonin production, the higher the color temperature the greater the inhibition of melatonin production.
Bottom line: provided you have adequate bright lighting from any source in your home you will inhibit melatonin production. I am sure everyone knows, but SAD is not solely the result of abnormal melatonin production. In extreme circumstances it may be beneficial to take an antidepressant as the above poster suggested.