The main ones so far are light boxes, visors and dawn simulators. Light boxes are about the size of a portable TV or even smaller. These boxes contain one or more special fluorescent tubes which give out a very bright light, usually equivalent to looking out of the window on a sunny spring morning. Most people need to use their box for about half an hour to an hour each day. The light visor sits on the head so that the two small bulbs shine directly into the eyes.
Busy people find the visor useful.
Boxes and visors are VAT free as the government recognises that SAD is disabling. Dawn simulators consist of an alarm clock with a light on top. This light gently comes on half an hour before the set time for the buzzer and gradually gets brighter. The alarm clock thus mimics a sunrise. The device is particularly recommended for sufferers with mild symptoms and it may be the only equipment they need.