Curious if I can convert a single turn switch on a lamp to a 3 way switch? Thank you
However, there are few three-way "bulbs" available, and very few energy-efficient LED or CFL three-way bulbs (which are a bit pricey), you'd be better off using a small dimmer switch in the base of the lamp, or using a remote controlled LED bulb.
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Yes you can if the light you are placing this in has a common setup, take photos of it to your local lighting store or just take the lamp, they most likely have a 1:1 replacement. But, if the lamp is unique, you might need to do something a little more creative. (e..g, a dimmer as noted in the other answer).