I had an older Ott floor lamp and cashs_mom is right. We threw it out because we couldn't get a lamp replacement for it that fit. For this and other reasons, I wouldn't buy another Ott. You can get similar style lamps at big box hardware stores such as Home Depot. What matters most is the quality of the lamp. The big box stores typically have an array of lights turned on so you can see the differences in temperature (and color) that Peckish mentioned. What you want is something that is neither icy cold (blue) or overly warm (yellow). Something that provides a spectrum close to natural light. If I were in the process of looking for one now, I would do a lot of research online first to find the specifications for the kind of light I would be wanting. Basically, what you are paying for with Ott and other lights is a premium for the research that they have already done for you.