Early Sodium Lamp Designs

Updated
20-IV-2013
This page features some of the earliest designs of low pressure sodium lamps. The original versions were only made in small quantities and were often more laboratory curiosities than commercially significant products. As such a very broad variety of different types was created. By 1932 however, most of the worlds manufacturers had standardised on the optimum design for this category of lamp, and the later standard-pattern lamps can be found under the other Sodium Vapour pages of this section.

Low Voltage DC

Philips

82W

Philora DC 4000lm - First Sodium Vapour Lamp
1932

Philips

82W

Philora DC 500lm - Small Polarimeter Lamp
Approx. 1945
   

Low Voltage AC

GE

190W

NA-9 10,000lm - First AC Sodium Vapour Lamp
1952

GE

85W

NA-1 500m - Small AC Lab-Arc Sodium Lamp
1960
   

High Voltage AC

Philips

80W

Philora DO80 Positive Column Cold-Starting
1932

Philips

80W

Philora SO500 Positive Column Self-Starting
c. 1935-1940