Dual Arc 1000w, High Pressure Sodium grow bulb for plant growth, grow light bulb 1000w, grow light, hps grow light. High Pressure Sodium grow bulb for plant growth, grow light bulb 1000w, grow light, hps grow light. Initial Lumens: 140,000Color Temp.: 2100CRI: 25Glass Size: ET25 This Super HPS grow lamp allows you to stretch your growing season to 365 days a year. Fine-tune your lighting system ...