Description
The 250W SON-E E40 is a specific type of high-pressure sodium (HPS) lamp with a coated, elliptical outer bulb and a Giant Edison Screw (E40) base, used for general public and industrial area lighting. The elliptical shape provides a broad, diffused light distribution.
Key Features & Applications
- Diffused Light Distribution: The elliptical bulb shape with an internal white coating broadens the light output, making it suitable for applications where even, general illumination is desired, rather than the focused beam provided by clear tubular (SON-T) lamps.
- High Efficiency: The lamp delivers a high luminous flux of approximately 27,000 to 31,600 lumens.
- Long Lifespan: It offers a long average lifespan, typically around 28,000 hours, with some advanced models lasting up to 36,000 hours. This reduces maintenance frequency in large installations.
- Warm Color: It produces a characteristic golden-white light with a warm 2000K color temperature.
- Operating Requirements: The lamp is a High-Intensity Discharge (HID) light source and requires a compatible 250W ballast and an external ignitor to start and run correctly.
Specifications
| Attribute | Value |
|---|---|
| Wattage | 250 W |
| Luminous Flux | ~27,000 – 31,600 lm |
| Lamp Base | E40 (Giant Edison Screw) |
| Bulb Shape | Elliptical (Coated/Ovoid) |
| Color Temperature | 2000K (Extra Warm White) |
| Average Lifespan | Up to 36,000 hours |
| Nominal Lamp Voltage | 100 V |
| Dimmable? | Yes, with appropriate control gear |
| Requires Ballast? | Yes, and external ignitor |
| Overall Length | ~226 mm |
| Diameter | ~91 mm |
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