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Posts Tagged ‘Broad Spectrum’

Blue Monday

Friday, January 20th, 2012

The Monday of the last full week in January is now popularly known as “Blue Monday”.

It is considered to be the most depressing time of the year and, apparently, there is even a special formula used to establish this depressing phenomenon.

For some of us, it could be the Christmas credit card bill landing on the door mat, New Year’s resolutions starting to waver, or the withdrawal of highly calorific food taking an emotional toll. But for many, the problem stems from something now medically recognised as Seasonal Affective Disorder (SAD).

Typical symptoms may include tiredness, difficulty waking up in the morning, general lack of energy, withdrawing socially, a pessimistic outlook on life, over-eating and a strong craving for carbohydrates, weight gain, a loss of libido and an all-round feeling of depression.

The shorter winter days seem to play a significant part in the problem.

It is thought that a lack of Vitamin D, which we normally get from sunlight, lowers our serotonin levels.

There is also a tendency to stay inside and avoid exercise during the cold winter months.

Physical activity is vital for our emotional wellbeing and can alleviate many symptoms of depression; a daily, brisk half-hour walk can make all the difference, even if it has to be in the evening, without day light.

What is important is the regular release of endorphins that will gradually begin to work their magic.

Additionally, Bright Light Therapy, otherwise known as light-box treatment, is reported as being very effective, with a high percentage of sufferers reporting total relief from their symptoms.

Light boxes are now widely available and often recommended as the first line of treatment for SAD.

Therapy intervention can also prove very helpful, one-to-one support helps to increase motivation and self-awareness – the key to keeping on top of the problem and preventing future episodes.

Bright Light Therapy

Monday, October 10th, 2011

It seems that Seasonal Affective Disorder (SAD) is starting to gain more attention in the news. Along with it, comes treatment options, like light therapy.

Yahoo News recently had a video about how bright light therapy can help you trick your brain into thinking it’s summer all year long.

Click HERE to watch the video.

If you have more questions about bright light therapy click HERE.

Broad spectrum vs Full spectrum, click HERE.

Or if you just received your light box, and may have questions on how to start using it, click HERE.

The Different Forms of Seasonal Affective Disorder

Monday, June 20th, 2011

The Different Forms of Seasonal Affective Disorder

These are some of the symptoms you can expect to find in most aspects of your life. If you find that you’re out of sorts during the winter, pay particular attention to winter-onset SAD. If you find that summer is especially difficult for you, see if your symptoms match up with summer-onset SAD. Finally, if you feel great during the spring and summer but other people find you difficult to deal with, check the symptoms for reverse SAD.

Winter-Onset SAD

Winter-Onset depression occurs during the winter months but not during the rest of the year. This type of SAD evokes a lack of interest in activities you would otherwise enjoy through the warm, summer months. Fatigue and low energy are often symptoms of Winter-Onset SAD, commonly leading to disinterest in completing simple tasks at work and at home. Oversleeping is also a common symptom, causing the affected to sleep in excess of anywhere from 2-8 hours more than they generally sleep during the summer. Additional symptoms include overeating – particularly sweet, starchy foods, resulting in weight gain as well as thoughts of suicide and overall despair.

Summer-Onset SAD

Summer-Onset SAD depression occurs during the summer, manifesting as an irritability and anxiety toward manners that wouldn’t normally trouble you during the winter months. Aggression, as well as a lack of caution in potentially dangerous situations are additional effects of Summer-Onset SAD, as is insomnia, causing you to sleep far fewer hours than you normally would during the winter. Increased sex drive or a lack of rational regarding appropriate sexual behaviour also occurs in many people affected with Summer-Onset SAD, in additional to poor appetite and weight loss. Thoughts of suicide and self harm are also common symptoms of this type of depression.

Reverse SAD

Reverse SAD manifests itself with an unnatural euphoria, hyperactivity, increased social interaction, an over enthusiastic attitude in addition to an overdeveloped sex drive. In extreme cases, people may take on an aggressive aspect to their personality, displaying the illusion that they are invulnerable to harm.


If you fit any of the above statements you may suffer from Seasonal Affective Disorder. It is suggested that you seek professional therapy. SAD light therapy lights are an effective treatment for Seasonal Affective Disorder which can eliminate your physical symptoms and alleviate your depression over a course of short, daily exposures. However, should your physical symptoms disappear, but reform internally into feelings of guilt, it may be an indicator of a much larger problem and you are urged to seek medical attention promptly.

Feeling SAD?

Wednesday, September 29th, 2010

During the winter months, the days get shorter and the nights longer. For many people–an estimated 6 to 10 percent of Americans–this change of schedule triggers a type of depression called seasonal affective disorder [SAD]. Symptoms can appear gradually or come on all at once, beginning in late fall then subsiding in spring–and often returning year after year.

SAD has been linked to biochemical changes in the brain that occur when daylight hours become shorter. Reduced sunlight affects the body’s internal circadian rhythms or biological clock–which tell the body when to sleep or awaken. When there is a lack of sunlight, the body takes it as a signal to increase the production of melatonin, a sleep-related hormone that has been linked to depression. Increased darkness also appears to affect the body’s production of serotonin, a neurotransmitter that affects mood. Low levels of serotonin have been linked to depression.

Symptoms of SAD include eating more than is usual; gaining weight; having difficulty staying awake; sleeping excessively; experiencing a drop in energy; being unable to maintain your regular lifestyle and schedule; having feelings of sadness, hopelessness, depression and irritability; losing interest in social interactions; and suffering a decreased sex drive and lack of enjoyment. Not everyone who has SAD experiences the same symptoms. Symptoms can range from mild to severe. Remission of symptoms usually occurs during the spring and summer months.

Light therapy is the most common treatment for SAD. Light therapy includes exposure to a broad-spectrum light for a minimum of 20 to 30 minutes per day. The light intensity should be at least 10,000 lux. Treatment may also include melatonin supplements, antidepressant medications and psychotherapy.

If you think you or someone you love may be affected by SAD, contact your physician to confirm that you are experiencing SAD. It is better not to diagnose yourself, because your symptoms may be associated with another medical condition, like thyroid disease, hypoglycemia, infectious mononucleosis or other viral infections. SAD can also be confused with major depression and bipolar disorder. Getting treatment that is right for you can help you function better and make a big difference in your life.

Read more: http://www.livestrong.com/article/15172-feeling-sad-this-winter-could/#ixzz10kY3hZMd

Differences in Lighting

Tuesday, April 27th, 2010

Common Electric Light Bulb

This is the most common type of lighting sources we use. It is also one of the least efficient. This passes electricity through a metal filament to produce heat. When the temperature reaches 943 degrees F (500 degrees C) the filament begins to give off light as well as heat. The light generated is adequate to see with, but is quite different from the light of the sun. This is because most of the energy that an electric bulb uses is wasted in producing infrared radiation (heat); only about six per cent of the energy input is used to produce light. The resulting light is heavy on red color and its neighbors, but contain very few violet, blue and green.

Fluorescent Strip Lighting

This is very popular in offices and factories. This is more efficient. But the light emitted differs from that generated by the sun. Within the glass tube of a fluorescent lamp, ultra violet rays are generated by a mercury vapor arc. The tube is lined with specially designed luminescent compounds which, when hit by the ultra violet rays, emit light of certain colors. Which colors are emitted depends on the type of compounds used to line the tube. Generally these tubes are designed to give off a high level of yellow-green light, the colors to which the eye is most sensitive. Thus they offer a seemingly very bright light while using relatively little energy. However, like the incandescent bulbs, their light is significantly different from that of the sun.

Full Spectrum Lighting

A few lighting manufacturers have built indoor lights that approximates natural daylight in intensity and color spectrum. What they have done is to replicate the spectral balance of daylight. These lights emit a certain amount of ultraviolet as well as all colors in daylight from red to violet. These lights are called full spectrum lights and are very useful for light therapy for SAD.

Full spectrum lighting is very similar to the fluorescent tubes. It uses a mercury vapor lamp to emit ultra violet light. The surface of the tube is coated with a compound which will emit the full spectrum light when hit by the ultraviolet light emission from the mercury vapor lamp. The coating is designed to emit all colors of the spectrum in approximately the same percentage as is found in natural sunlight minus the harmful ultraviolet light. Shields are generally provided to prevent the user from getting accidental exposure to the ultraviolet light.

Comparison of light intensities from different light sources
(Lux is unit to measure light intensities)

Under sunny sky on the beach 100,000 lux
Typical Bright light therapy product for SAD treatment 10,000 lux
In spring, outdoor a few minutes after sunrise 10,000 lux
In a very well lit office 500 to 1000 lux
At home (conventional lighting) 300 to 500 lux
Typical desk lamp (in a bedroom) 100 lux

Full Spectrum Lighting versus Broad Spectrum Lighting

Full spectrum light bulbs are made to try to imitate natural sunlight, and like sunlight, they also produce UV rays. Typically full spectrum bulbs have a Color Rendering Index (C.R.I.) of 90 or above (Outdoor light has a CRI of 100) and a Kelvin temperature of 5,000 or above. Full spectrum light is described as having a purple or a bluish cast. Most light box companies using full spectrum light bulbs now block these UV rays through their diffuser screen. Make sure they do before purchasing their products.

Broad spectrum light boxes are often described as being as close to full spectrum as you can get without the UV rays. Typically they have a CRI of around 82 and a Kelvin temperature of around 4200. Broad spectrum light bulbs are described as being a pure white light. Most light box companies use a broad spectrum light bulb so that there is no danger of UV rays.

Ultraviolet Light

One of the major safety concern of exposure to light is the possibility of being exposed to ultraviolet (UV) light. Exposure to ultra violet (UV) light can cause sunburn, eye damage and skin cancer. Recent studies have shown that UV rays are not an essential component of light therapy; units that emit almost no UV light are just as effective. Many of the light box manufacturers provide shields to filter away the UV light. Make sure that the unit you buy complies with this.

The North Star 10,000 is a broad spectrum light. With our brightness level of 10,000 lux at two feet, the North Star 10,000 is effective, easy and safe to use!


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