I just replaced the bulb in a floor lamp Ott light which I bought used from another quilter, so I have no idea how long the first bulb lasted. I went to JoAnn's for the bulb, which looks like four short fluorescent bulbs side by side, attached at the short end, with with one plug in the middle. JoAnn's didn't have the bulb, but Lowe's did. It was a $10 bulb, and I don't know if it's a daylight bulb or not, but at least the light works again.