"Supalite" (GEC) 100w pearl GLS lamp

A lamp I found recently, which has a bit of a story attached to it... Basically, my mother found this in a cupboard at her place of work and one quick chat later it is now safely in my collection. Amazing to think it has been stashed away all these years! The Supalite brand itself is odd, such rebranded lamps from major manufacturers were quite popular in the 1970s and 1980s. I have some 100w Supalite-branded lamps in a later style of packaging somewhere.