I love my Ott Lights! I have two floor models in my sewing room and a portable one that I take to sewing classes. I'm thinking about getting another floor model to place by my ironing board. I get them when they are on sale at JoAnn's.
I have replaced only one bulb and that was when someone knocked my lamp off in a sewing class. I think I bought the replacement bulb at an office supply store. I've had one of the lamps for ten years.