175W High Pressure Sodium Bulb for Efficient Outdoor Lighting

175W High Pressure Sodium Bulb for Efficient Outdoor Lighting. High Luminous Efficacy: Exceptional luminous efficacy over 150Lm/w for efficient outdoor lighting. Fog and Mist Penetration: Golden-yellow light with longer wavelength excels in low-visibility areas. Voltage Fluctuation Resistance: Ensures excellent adaptability to grid voltage changes, outperforming LED. Durable Quartz Glass: Premium sodium arc tube with high-grade quartz glass from renowned supplier. Custom Logo Printing: Available on bulb and color box in gold/silver colors. Environmental Tolerance: Robust and resilient to temperature fluctuations and vibration. E39/E40 Lamp Base: Nickel brass lamp base with lead-free construction for durability. Long Service Life: Average life of 22000-23000 hours depending on wattage.