It does not work. Colored light therapy is the promotion of lights of various colors to treat sleep disorders, shoulder pain, diabetes, impotence, and allergies, among other health problems. Blue, red, and violet lights are most commonly used. These bogus, or not genuine, treatments may use flashing lights or a steady beam of light. Sunlight is a major source of Vitamin D, which is essential to good health.
Vitamin D helps build strong bones and teeth, and ensures muscle and nerve function.
It is available in fortified dairy products, fish and organ meats, but sunlight is its primary source. It is known that added light can help in very specific ways for a limited number of specific problems. Research shows that adding brighter, whiter light to dimly-lit factories and other workplaces increases productivity, especially in areas where work is done at night. Research also indicates that good light improves efficiency in offices. Keeping a regular sequence of day-night hours can aid circadian rhythm consistency, which helps develop better overall good health.