Lighting-Gallery.net - North American bulbs, fixtures, and control gear/35w SOX low pressure sodium lamp running on 35 watt magnetic metal halide ballast
Philips SOX 35W BY22d rode lampvoet
Low Pressure Sodium - SOX
Philips SOX 35W Low Pressure Sodium Lamp with Box! Made in UK READ | eBay
SOX135 WATT LOW PRESSURE SODIUM LIGHT BULB 30,000 HOURS SUPRA LIFE - T21 SHAPE - BY22D BAYONET BASE SOX LAMP 135 WATTS" - High Intensity Discharge Bulbs - Amazon.com