A ceiling light that goes up and down is known as an adjustable pendant light. However, the term "Tiffany" refers to the design style used by famed designer Louis Comfort Tiffany in his stained glass lamps in the late 19th and early 20th centuries.
If you are looking for a stained glass lamp Tiffany style ceiling that is also height adjustable you have found it. This lamp has a weighted pulley system that allows you to adjust the height of the lamp, to adapt it to your lighting needs or preferences.
Adjustable Tiffany-style ceiling lamp or height-adjustable Tiffany suspension lamp.