UL的在UL153有特别说明:
2.42.1 TORCHIERE – A portable luminaire supported by the floor having a bowl shaped shade with the concave surface facing upward (open top/closed bottom design) intended to provide indirect light. The lamp (bulb) is typically 5 – 6 feet (1.27 – 1.52 m) above the floor and is hidden from direct view by the concave shade. A floor unit that has an adjustable bowl shaped shade where the concave surface of the shade can be directed upward to an angle greater than 45 degrees from the horizontal is also defined as a torchiere.