Philips Lighting SOX 35W 35 Watt Bulb Low Pressure Sodium. Electrical Parts And Supplies - PartsXP
Philips SOX 35W BY22d – DBL Verlichting - webshop
Philips SOX 35W Low Pressure Sodium Lamp with Box! Made in UK READ | eBay
Low Pressure Sodium - SOX
Lighting-Gallery.net - North American bulbs, fixtures, and control gear/35w SOX low pressure sodium lamp running on 35 watt magnetic metal halide ballast
Lighting-Gallery.net - Fixtures and Lamps (that I own)/Custom 35W SOX Lamp
Philips SOX 35W Low Pressure Sodium Lamp with Box! Made in UK READ | eBay