Update: I wrote a question about this issue a few days ago. Someone through customer service contacted me; suggested I be sure the bulb was in 'extra tight' so the electrical connection were activated. Just did that and VIOLA...works for all 3 lighting levels. Awesome customer service; GREAT lamp--like it even more!!! This is a beautiful lamp; I wish I could rate it a "5" but the three way bulbs (I've tried 4 different ones) will not work in either of them (bought 2). I needed the lamps to light a very large, dark apartment and knew I'd primarily use the 150 watt but wanted flexibility. Only the middle setting of 100 works--the switch clicks 3 times but only lights once. Unfortunately, I tested the lamps with a regular bulb to be sure they worked and discarded all the packaging before trying the 3-way bulbs.
We were very pleased with this Avery lamp for our office. It gives off gentle, yet effective lighting, and looks gorgeous. One should be aware that the lampshade is a golden bronze and not white as pictured. We ordered a second one after seeing just how good looking this lamp is.