Amazon.com: YOOLUX 400W HPS Bulb (HIGH Pressure Sodium) for Indoor Plant,High PAR Promote Red and Orange Spectrums Flower Bulbs CCT 2100K, Supper Bright 56,000 Lumens. Grow Light Bulb Lamp(1-Pack) : Patio, Lawn
Agrosun Red Sodium High Pressure Sodium (HPS) Lamp, 400W - GreenLightsDirect
Amazon.com: Vegelumax 2-Pack 400W HPS Super Grow Light Bulb,High PAR Enhanced Red and Orange Spectrum for Horticulture Plant Growth Flourishing,CCT 2100K,Ultra Bright 55,000Lumens,E39 Base : Everything Else