Low pressure sodium SOX lamp lit showing the deep orange monochromatic light the lamps emit which causes objects to be rendered without colour Stock Photo - Alamy
SOX55 LED replacement - Consumes 35W 120-277V 2200K
soxlamps.org: low-pressure sodium lamps
SOX Sodium, LPS or low pressure sodium lamp warming up. The pink/red glow of the lamp in its warm up stages is a neon discharge from the fill gas Stock Photo -
Philips 135w BY22D low pressure sodium Street lamp sox plus | eBay
LIGHT EFFICIENT DESIGN LED Sox Bulb, T17, Bayonet Base (B22d), 2200K, 3,232 lm, 35 W, 120 to 277V AC - 55VR28|LED-8101-22K - Grainger
Lighting-Gallery.net - HID/A new generation Philips SOX lamp 26 watt.
Lighting-Gallery.net - Control Gear/Philips EXC035 S 50 Electronic Sodium Lamp Ballast & OSRAM 35w SOX lamp
Philips Mini-SOX 18W
Best Price SOX-E 26W Low-Pressure Sodium Lamps from China manufacturer - TONHI
Heads Up! Philips Low Pressure Sodium SOX Bulbs Are Going the Way of the Dodo - AtlantaLightBulbs.com