I bought two at a thrift shop for a couple bucks each. Some are made better than others, but if you can adjust the joint tension with fingers or a screw driver they all work. I have 1/2 inch holes drilled in places through out the shop. If you remove these lights from the bases, they all fit a half inch hole, so are very easy to move around. For surfaces I don't want holes in, like my table saw, I drill the hole in a 2x4 and and clamp it in place.I am having a heck of a time locating a good articulated shop light like the one in the picture. Anyone have an idea where I can get one?