What to consider

Here are some questions to think about when buying a light box for seasonal affective disorder (SAD):

  • Is the light box made specifically to treat SAD? If not, it may not help your depression. Some light therapy lamps are designed for skin disorders — not SAD or depression. The light boxes that treat skin disorders emit more ultraviolet (UV) light than the boxes that treat SAD, and they could damage your eyes if used incorrectly.
  • How bright is it? Brighter boxes will require less time to use each day, compared with dimmer boxes, to achieve the same effect. Look for a light box that provides the right intensity of light at a comfortable distance — ask your health care provider for recommendations.
  • How much UV light does it release? Light boxes for SAD should be designed to filter out most UV light. Look for a light box that emits as little UV light as possible. Contact the manufacturer for safety information if you have questions.
  • Does it use LEDs? Traditionally, light boxes have used fluorescent or incandescent lights. Some manufacturers now sell light boxes with light-emitting diodes (LEDs).
  • Does it emit blue light? Typically, light boxes use white light, but some light boxes give off blue light with a shorter wavelength. There is much more research available to support the use of bright white light to treat SAD than there is for blue light.
  • Can it cause eye damage? Although eye damage from using a light box is uncommon, blue light may pose a greater risk of harming your eyes than white light does. Check with the manufacturer if you have concerns about light box safety.
  • Is it the style you need? Some light boxes look like upright lamps, while others are small and rectangular. You can even buy a battery-powered light therapy device attached to a visor, but it isn't clear yet whether this type of light works as well as a standard light box. Because the effectiveness of a light box depends on daily use, it's important to buy one that is convenient for you.
  • Can you put it in the right location? Think about where you'll want to place your light box. Keep in mind that most boxes need to be within 2 feet (61 centimeters) of you.
  • Does your doctor recommend it? Talk to your health care professional about light box options. Doctors recommend that you be under the care of a health care provider while using light box therapy. If you are experiencing both SAD and bipolar disorder, the advisability and timing of using a light box should be carefully reviewed with your doctor.
March 09, 2013 See more In-depth