These lamps give "light therapy" designed to chase away the blues that people can get from too little exposure to sunlight. This problem is usually associated with winter when there is less daylight, but many seniors do not get sufficient sunlight any time of year. The HappyLight sits on a desktop or mounts on a wall. It gives up to 10,000 LUX of Natural Spectrum Daylight. The light is designed not to flicker or buzz, and turns on instantly. Verilux, the manufacturer, has several models of the HappyLight that range in size and power. They retail for $89.95 to $189.95. HappyLights can be purchased at big box stores, or online at verilux.com.