WHAT IS SAD? Seasonal Affective Disorder (SAD) is a specific type of recurring depressive illness that manifests in an annual pattern, usually from early-to-late fall and subsiding with the longer, sunnier days of spring.1 Some people have the milder form, called Subsyndromal-Seasonal Affective Disorder (S-SAD), also called Winter Blues, which causes minor problems in their lives but not the total disruption that full-blown Seasonal Affective Disorder causes.
This is the Winter-Seasonal Affective Disorder subtype; another subtype is Summer-Seasonal Affective Disorder, which occurs in the spring & summer months. Summer-Seasonal Affective Disorder is much rarer than Winter-Seasonal Affective Disorder, is less well researched, and its cause is undetermined. Throughout this website, unless otherwise noted, the term "SAD" refers specifically to Winter-Seasonal Affective Disorder.
Researchers have confirmed that specific biological changes within the brain occur in response to different levels of bright light exposure, and that these biochemical changes affect hormones and neurotransmitters responsible for regulating our mood, energy, sleep and appetite. In the majority of the population, these changes are not troublesome; they simply cause minor variations in their annual rhythms. For those with SAD, though, these changes are profound enough to cause significant disruption to their lives.
The term "full spectrum" is a loosely defined term in the lighting industry. Generally, it refers to light that has a color temperature of between 5,000-6,500° Kelvin. It may, but does not necessarily, include the UV wavelengths - again, the term is loosely defined, and is used differently by different lighting companies. At The SunBox Company, we use the term to mean the visible portion of the spectrum, without the UV wavelengths.
Full spectrum light, regardless of whether it contains UV, appears whiter than other types of artificial light - cool white, warm white, broad spectrum - as it contains a greater distribution of colors within the visible spectrum (White light is composed of all the different colors of the spectrum). Cool white bulbs, for example, appear yellow-orange when compared with full spectrum bulbs, because they are significantly deficient in the blue-green part of the spectrum.
All SunBox light boxes use bulbs that emit color temperatures of 5,000-5,500° Kelvin. As stated in the Safety section above, we eliminate the UV wavelengths from our light boxes with the acrylic diffuser.
Originally posted by jazzgul
Two year ago I've heard that from my doctor in Holland. I got one week to get better (officially ill)
seriously -this is lack of outside activities -we are humans -we need sun...
I guess you should relax, get a walk in the country, take day off from your job, it helps....