VIVOSUN 400 W High Pressure Sodium HPS Grow Lamp - Enhanced Spectrums CCT 2100K, Ultra 55,000Lumens - Walmart.com
Amazon.com: iPower GLBULBH400 Pressure Sodium Grow Light Bulb Lamp for Plants High PAR Enhanced Red and Orange Spectrums CCT 2100K, 400W HPS New : Everything Else
Hydro Crunch 400-Watt High Pressure Sodium Replacement HID HPS Grow Light Bulb D911009200 - The Home Depot