Many people get the winter dip. This is because the sunlight is not strong enough, in order to trigger the production of serotonin in the brains going. And if you work all day, you go into the dark road and you come home in the dark. It is a common misconception that would help the solarium. The solarium you'll get a nice tans, but the UV radiation from the sun does not help against the winter blues. Make sure you're outside a lot during the day in winter. If that does not help and you feel depressed a long time, go to the doctor. Who can prescribe a treatment with a special light lamp of 10,000 lux. These lamps are also for sale in the store.