Lamp by Arthur Jacobs, San Francisco
A floor version of the lamp is seen here in Pierre Koenig's first house, Koenig #1 (1950) in Glendale, Ca.
Source: Pierre Koenig by Steele & Jenkins
For years, I only knew about the Jacobs lamp in the top photo. I was digging around recently and it turns out that Jacobs also designed this lamp in 1954 and the one below.
Jacobs for Modeline, 1959