Quick Answer: The Sodium Lamp Transformer is a 35 W leakage-reactance ballast for starting and running a 35 W low-pressure sodium vapour lamp from 220 V – 240 V AC mains, housed in a ventilated powder-coated steel case.
Last updated: October 2026
Key Features
Drives a 35 W low-pressure sodium vapour lamp
High-leakage reactance ballast provides the ignition strike and limits discharge current
Vacuum-impregnated copper windings, Class H insulation
Ventilated, powder-coated cold-rolled steel case
Colour-coded 4 mm shrouded sockets
Technical Specifications
Specification
Value
Input
220 V – 240 V AC, 50 Hz
Lamp
35 W low-pressure sodium vapour
Type
High-leakage reactance electromagnetic ballast
Windings
Vacuum-impregnated copper, Class H insulation
Case
Powder-coated cold-rolled steel, ventilated
Terminals
4 mm shrouded sockets, colour-coded
Size
Approx. 180 mm x 120 mm x 110 mm
About This Product
A sodium lamp gives the near-monochromatic yellow light used in optics practicals, and it needs a ballast to strike and hold a steady discharge. The transformer is used with a sodium lamp for Newton’s rings, diffraction grating, biprism and polarimeter experiments in college physics labs.
Frequently Asked Questions
Which lamp does the Sodium Lamp Transformer run?
It is matched to a 35 W low-pressure sodium vapour lamp.
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