I saw two different kinds at Menard's last Thursday. I had to ask a store clerk just where to find them. One of them fits on the cord. The other has a plug/receptacle on one end of the cord. This kind requires no wiring--just plug the dimmer into the wall and the lamp into the top of the dimmer plug. They were $10 each. I bought the kind with the plug/receptacle. Hope this helps.
one short question from me: is it possible to run every lamp with a dimmer or does this affect the fluid/wax (cloudiness, lifetime)? i think it would be nice if ordinary lamps without a dimmer could run much longer with a dimmer turning down the heat of the lamp when flowing started.
I just recently purchased 2 from Amazon that were made by leviton and wired them directly into the cord. You can also buy ones that you simply plug into as well. They're great. You can real "dial in" that specific flow your looking for.
With these in line dimmers, how do you know exactly how much you're turning it down? Is there a way you know if you're turning it down to a specific wattage or even if you're turning it down to half, etc.?