Amazon.com : Ultra Sun HPS 1000 Grow Lamp - Full Spectrum High Pressure Sodium Lamp, Ideal for Plant Growth, 1000 W : Video Projector Lamps : Patio, Lawn & Garden
Opulight 600W High Pressure Sodium Super HPS 2100K Grow Light Bulb Lamp, 1-Pack : Amazon.ca: Patio, Lawn & Garden
Amazon.co.uk Best Sellers: The most popular items in High Pressure Sodium Bulbs
SOX90 WATT Low Pressure Sodium Light Bulb 30,000 Hours Supra Life - T21 Shape - BY22D Bayonet Base SOX LAMP 90 WATTS" - High Intensity Discharge Bulbs - Amazon.com
Amazon.co.uk: High Pressure Sodium Bulbs - High Pressure Sodium Bulbs / High Intensity Dischar...: Lighting
Ben Krasnow on Twitter: "You can still buy low pressure sodium lamps (eg on Amazon), but the ballasts are expensive and rare. I found that using a cheap CFL ballast, and replacing