Sodium Vapour Lamp | HPSV E40
The High-Pressure Sodium Vapour (HPSV) Lamp with E40 base is a high-efficiency discharge lamp widely used for street lighting, industrial areas, and greenhouse farming due to its bright yellow-orange light and long lifespan.
Key Features
✔ Lamp Type: High-Pressure Sodium (HPS)
✔ Base Type: E40 (Screw-type, 40mm diameter)
✔ Color Temperature: 2000K–2200K (Warm Yellow-Orange)
✔ Luminous Efficacy: 80–150 lumens/watt (Highly efficient)
✔ Lifespan: 16,000–24,000 hours
✔ Warm-up Time: 5–10 minutes (needs ballast)
✔ Re-strike Time: 3–5 minutes (must cool before restarting)
Technical Specifications (Common Models)
| Wattage | Lumen Output | Voltage | Common Use |
|---|---|---|---|
| 70W | ~6,000 lm | 220-240V | Small streets, parking |
| 150W | ~15,000 lm | 220-240V | Medium road lighting |
| 250W | ~27,000 lm | 220-240V | Highways, industrial |
| 400W | ~50,000 lm | 220-240V | Large-area lighting |
Working Principle
Ignition: High voltage from the ballast ionizes xenon gas.
Sodium Vaporization: Heat vaporizes solid sodium, producing light.
Stable Operation: Sodium & mercury gases emit yellow-orange glow.
Advantages
✅ High Efficiency – Better than halogen & incandescent.
✅ Long Lifespan – Lasts 4–5x longer than traditional bulbs.
✅ Good for Outdoor Use – Resists weather & temperature changes.
Disadvantages
❌ Poor Color Rendering (CRI ~20-30) – Everything looks orange.
❌ Slow Start & Restart – Not ideal for instant lighting needs.
❌ Requires Ballast & Ignitor – Additional components needed.
Wiring & Ballast Requirements
Needs a Magnetic/Electronic Ballast (HPS-specific)
Ignitor required for starting (~4kV pulse).
Capacitor (optional, for power factor correction)https://store.unigulfsupply.com/product/hpsv-sodium-vapour-lamp/