Win a LitePod

Winter makes us cold, cranky and craving for carbohydrates, but did you know there's a reason for all this? Seasonal Affective Disorder (S.A.D.) affects nearly 10 per cent of the UK population during the winter. S.A.D. can leave you feeling lethargic and depressed - but luckily there is an easy cure.

The S.A.D. Lightbox Company manufacture a range of lightboxes that are medically proven to make you feel re-energised and happier this winter.

During winter there are fewer hours of daylightm which decreases Serotonin, the hormone that keeps us happy. Exposure to bright light therapy through lightboxes reverses the process and prevents the winter blues. Using a LitePod will replace the sunlight that we are missing and give you more energy during the day.

Alternatively, if you just hate waking in a dark bedroom through the winter, the DawnLite - a bodyclock dawn simulator - wakes you slowly with natural light, resetting your sleep cycle to help you feel refreshed, alert and energised all day. For more information on how to avoid SAD this winter visit www.sad.uk.com

The Independent is offering you the chance to win your own S.A.D. Lightpod and stay sane this winter, answer this simple question:

This competition closes on Friday 17 December.

To read the Independent's terms and conditions, click here.