standard lamp

lamp used as a reference in photometric or spectroradiometric measurements for which the calibration is traceable to a primary photometric or spectroradiometric standard

NOTE The term is sometimes also used for a portable luminaire on a high stand suitable for standing on the floor.
Equivalent term used in the US for this usage: "floor lamp"

Theme by Danetsoft and Danang Probo Sayekti inspired by Maksimer