I have four Ott lamps and have had problems with all but one of them. The craft one that has a small plastic stand is too light on the bottom and falls over every time I use it. I finally just put it away. The one with the gooseneck has a very heavy base and I use it on the table by my machine, this is my favorite. My bedside one and my big floor lamp have a problem with the extendable neck sliding down. After I get them set at just the right height, they slide right down to the lowest level. My DH finally put duct tape around them to hold them in place. But of course that means I can't adjust them at all anymore. I will not buy another lamp by Ott. There are many lamps on the market that are just as good and quite a bit cheaper. What we are paying for is the fancy lamp. The bulbs can be found at Home Depot. I use those bulbs now in all my lamps and find them to be quite adequate.