Feeling the winter gloom, but without the means to take a sunny holiday? Why not try light therapy. Putting yourself under a lamp imitating sunlight can help you feel almost as good as lying on a beach without the sunburn. Anaelle, Light Therapy User - Pr. Damien Léger, Head of Sleep Centre, Hotel-Dieu Hospital, Paris - Delphine Garrouste, Product Manager, Kiria. A dreary January morning. Grey skies can lead to winter blues millions are affected by it. Anaelle isn’t depressed, but she admits the weather plays with her mood. Anaelle, Light Therapy User, "I may be more stressed out, I run out of patience more often. I may be more of a pain than usual."In these times of economic uncertainty, getting some winter sun isn't for every pocket. So Anaelle bought herself a light therapy lamp instead. Anaelle, Light Therapy User, "It won't replace holidays, let's not kid ourselves, but it feels good yes, I feel much more rested."So does sun really give you a boost? At the sleep centre of this Paris hospital, light therapy has been used on patients for five years. Prof. Damien Léger, Head of Sleep Centre, Hotel-Dieu Hospital, Paris, "When you are exposed enough, especially in the morning, to daylight or a day light-type of lamp when you don't have enough day light, well it's enough to resynchronize your clock."Technically, light goes through the retina nerves and affects the secretion of melatonin a hormone that synchronizes sleep. Used well, it can also help you feel more awake. And it's catching during the winter gloom. In this shop, sales have gone up 20 percent every year for the last two years. Delphine Garrouste, Product Manager, Kiria, "It's no longer just elite that comes to see us, but more ordinary customers. They come first to get information, and when they see it's not a gadget, then they come back to purchase it.