Seasonal Affective Disorder (SAD) is a type of depression that occurs during the fall and winter months when the days are shorter, and there is less natural sunlight. It is estimated that around 5% of the US population has SAD, and another 10-20% experiences a milder form of the disorder known as the “winter blues.”
Light therapy, also known as phototherapy, is a non-invasive treatment that can effectively treat SAD. It involves exposing the person to bright light using a lightbox or other light therapy device, typically for 30 minutes to an hour per day.
What is Light Therapy, and How Does it Work?
Light therapy uses a light box, which emits light at a specific intensity, colour, and wavelength. The power of light in light therapy is usually much brighter than the typical indoor light and is similar to the light experienced during the summer months.
Light therapy is believed to help regulate the levels of melatonin, a hormone that helps control the sleep-wake cycle, in the body and increase the level of serotonin. This chemical impacts mood and emotion. This, in turn, helps to alleviate the symptoms of SAD.
The Scientific Evidence for Light Therapy:
Several studies have been conducted on the effectiveness of light therapy for SAD, most of which have shown promising results. For example, a meta-analysis published in the Journal of Affective Disorders in 2013 found that light therapy effectively reduced symptoms of SAD in about 70% of patients who received it.
In addition, studies have also shown that light therapy can effectively treat other mood disorders like non-seasonal depression, bipolar disorder, and insomnia.
However, it is worth noting that light therapy may not be effective for everyone, and it’s not recommended for people with certain eye conditions or skin disorders. Before starting light therapy, it’s essential to consult a healthcare professional.
How to Choose a Light Box and Use it Effectively:
When choosing a light box, it’s important to consider critical factors such as intensity, wavelength, and timing. The power of the light should be at least 10,000 lux, and the wavelength should be between 2,500 and 10,000 nanometers.
It is also recommended to use light therapy during the morning hours when possible, as this aligns with the natural sleep-wake cycle and can help regulate the circadian rhythm. The suggested use time is 30 minutes to an hour per day, although a healthcare professional may advise otherwise.
The distance between the person and the lightbox is also essential. It is generally recommended to sit about 18 to 24 inches away from the box, but it can vary based on the intensity of the light.
Psychotherapy and SAD
When used together, psychotherapy and light therapy can provide a comprehensive approach to treating SAD, addressing both the physiological and psychological aspects of the disorder. While light therapy can help regulate the levels of hormones in the body, psychotherapy can help individuals develop coping strategies and improve their overall well-being.
It is also worth noting that light therapy can be used as an adjunct to medication, such as antidepressants, in the treatment of SAD. Light therapy can be a useful alternative for those who do not want to take medication or cannot tolerate the side effects.
It’s important to consult a healthcare professional to determine the best treatment plan for SAD which can include one or a combination of these therapy options. A combination of these approaches can provide the most effective treatment, which can lead to better outcomes.
Light therapy can be an effective treatment for SAD, with many studies showing positive results. It works by regulating the levels of certain hormones in the body and can help alleviate the disorder’s symptoms.
However, it’s crucial to choose a light box that meets the recommended intensity, wavelength, and timing standards and use it under a healthcare professional’s guidance.
Getting Help for SAD
If you’re experiencing symptoms of SAD, you must talk to your healthcare provider about your options, including light therapy. In addition to light therapy, other treatment options for SAD include psychotherapy, medication, and lifestyle changes such as a regular exercise and a healthy diet. You can also look into other alternative therapies such as Yoga, meditation, aromatherapy etc. – Remember that SAD is a treatable, condition. There are many options available that can help improve your mood and quality of life during the fall and winter months. If you suspect you might have SAD, don’t hesitate to reach out to a healthcare professional for guidance and support.