There are many different models of Light Therapy Lamps available to deal with seasonal disorder. This seasonal disorder is also known under the abbreviation S.A.D, sometimes you may see these lamps actually marked as SAD Lamps. Finding the right model for you really depends on your needs, if you are planning on using it on a daily basis and not just during the winter then springing for a slightly more expensive model is a good idea. This is because these models are built with slightly heavier duty components, and can with stand more usage. If you opt for a cheaper model you may be fine as well, but for the few dollars saved it may well be worth buying a higher quality model. If you are unsure which brand of light therapy lamp to purchase the internet is fantastic resource to pull up information. You can quickly find other reviews and opinions about the model lamp in question. Doing this may take a few minutes of your time, but it can be well worth the effort. A good quality sad lamp should last you your entire lifetime. It really depends on how much you use it, but there are a number of companies that rate their lamps life expectancy as well. You can find this on the websites of the lamps that you are planning to purchase.