This device is designed for the treatment of Seasonal Affective Disorder (SAD) and other related conditions. SAD afflicts as much as twenty-two percent of the population in some northern latitudes. It is basically a seasonal onset of depression directly related to the decreased amount of sunshine during the winter months. It can be accompanied by lethargy, fatigue, weight gain and other problems that can severely impair the affected person’s daily life and overall level of happiness.

Conventional treatments involve sitting in front of a large \'light box\' in the early morning for anywhere from 30-60 minutes. The problem with this is that SAD tends to disrupt the circadian rhythms of those diagnosed with it, so they are less able or likely to wake up earlier in the morning than usual for treatments. They begin to skip treatments in favor of sleep and their condition worsens.

Liquid Sunshine offers a few important features. First, it uses specific frequencies of blue wavelength LEDs which have been proven more effective than traditional fluorescent light. This allows the time of treatment to be shortened from 30-60 minutes to 10-15 minutes, a reasonable length of time to spend in the shower. Second, since it is designed for use in the shower, it combines morning activities, meaning the person does not have to get up any earlier than they typically would. Lastly, it provides a warming, calming environment in which the user is bathed in a deluge of light and water. This multi-sensory experience is very therapeutic and helps people regain their own feelings of health and well-being every morning.

Figuring out a way to power an electrical device in the shower posed a challenge and eventually I decided to power the device using a small turbine in the body of the unit. It uses the water pressure to generate enough electricity to light the LEDs