Osram SON-T 250 W E40 | Product Description
Bright, Efficient Sodium Lighting for Professional Use
Upgrade your outdoor and industrial lighting with the Osram SON-T 250 W, a reliable high-pressure sodium lamp engineered for longevity, efficiency, and consistent performance.
Key Features & Benefits
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High Luminous Output & Efficiency
Delivers approximately 33,200 lumens with outstanding luminous efficacy (~133 lm/W), ensuring powerful illumination with less energy. -
Long Life & Dependable Maintenance
Engineered for an average lifetime of 32,000 to 36,000 hours, with excellent light retention—LLMF of around 90% after 16,000 hours. -
Warm, Recognisable Glow
Emits a signature 2,000 K warm golden light with a Colour Rendering Index (CRI) around 25, ideal for environments where cost-effectiveness and visibility are priorities. -
Robust Design & Compatibility
Clear tubular (T) envelope with a GES/E40 screw base, suitable for universal burning positions. Compatible with both open and enclosed luminaires and supports external ignitor operation. -
Compliance & Sustainability
Meets ErP energy efficiency standards (energy label A+ to E depending on variant), and offers energy savings of up to 50% compared to mercury vapor lamps.
Technical Specifications
| Specification | Details |
|---|---|
| Wattage | 250 W |
| Base Type | GES / E40 (Giant Edison Screw) |
| Shape & Finish | Tubular clear (T) |
| Colour Temperature | ~2,000 K (warm golden) |
| Luminous Flux | ~33,200 lm |
| Luminous Efficacy | ~132–133 lm/W |
| Average Lifetime | ~32,000–36,000 hours |
| Light Maintenance Factor | ~90% at 16,000 h |
| Colour Rendering Index | ~25 |
| Max Outer Bulb Temp | 400 °C; Base edge max 250 °C |
| Dimensions | ⌀ ~47 mm, Length ~257 mm, LCL ~158 mm |
| Mercury Content | ~19.9 mg |
| Dimmable | Yes, on suitable gear |
| Burning Position | Universal / Any |