Philips

Philips SON-T 250W E40 High Pressure Sodium Lamp

Rs. 2,100.00 Rs. 980.00 Save 53%
  • 250W powerful lighting
  • High-pressure sodium lamp
  • Clear tubular outer bulb
  • Ideal for industrial use
  • Enhanced safety & visibility
  • Reliable & efficient performance

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About This Item

Philips SON-T 250W E40 High Pressure Sodium Lamp – Reliable, Efficient Lighting Solution

The Philips SON-T 250W High Pressure Sodium Lamp with E40 base is designed for reliability, efficiency, and performance. Emitting a powerful warm white light, it is ideal for outdoor lighting, industrial areas, and horticultural environments. With excellent lumen maintenance and energy efficiency, the SON-T 250W offers a cost-effective lighting solution for both commercial and large-scale installations.


Key Features:

  • High Luminous Output – Delivers approximately 33,000 lumens for effective area coverage

  • Energy-Efficient Performance – Low power consumption with high light efficacy

  • Extended Lifespan – Up to 32,000 hours of reliable operation

  • Consistent Light Quality – Stable warm color temperature ideal for plant growth and urban lighting

  • Standard E40 Base – Easy replacement and installation

  • Universal Burning Position – Flexibility in mounting and orientation


Technical Specifications:

  • Lamp Type: High Pressure Sodium (SON-T)

  • Wattage: 250W

  • Base Type: E40 (Giant Edison Screw)

  • Luminous Flux: Approx. 33,000 lumens

  • Color Temperature: 2000K (Warm White)

  • Lamp Voltage: ~100V

  • Average Lifetime: 28,000 to 32,000 hours

  • Ignition Time: < 10 seconds

  • Warm-up Time (60%): < 1.5 minutes

  • Dimensions: Approx. 259mm (length) x 47mm (diameter)

  • Operating Position: Universal


Ideal For:

  • Horticultural and greenhouse lighting

  • Street lighting and roadways

  • Warehouses and industrial spaces

  • Floodlights and security lighting

  • Commercial outdoor installations


Benefits:

  • Cost-Effective Lighting with lower maintenance and energy costs

  • Optimized for Plant Growth with warm spectrum light output

  • Durable and Reliable performance in all weather and conditions

  • Wide Compatibility with existing E40 fittings

  • Excellent Light Uniformity for safety and visibility outdoors


Choose the Philips SON-T 250W E40 High Pressure Sodium Lamp for reliable, efficient, and long-lasting illumination. Whether you need to enhance plant production, improve street safety, or illuminate industrial spaces, this lamp offers performance you can trust.

We offer a 7-Day Conditional Return & Exchange Policy on most of our products.

Subtle Sophistication, Radiant Results

Let Lighting transform your space with understated brilliance. Lighting redefines elegance with lighting solutions that blend seamlessly into any décor. Designed for modern spaces, our lights offer understated style while delivering powerful, radiant illumination.

Choose the Right Light Color

Choose the perfect lighting for your space! Our LED solutions offer colour temperatures ranging from 3000K to 6500K. For a cosy, warm glow, go with 3000K. If you prefer a bright, cool white lighting, then 6500K is the way to go. For Natural white go with 4000K.

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Frequently Asked Questions

Get Your Queries Answered

Fundamental Lighting Terms

Lumen (lm):

A lumen is the unit of luminous flux, representing the total amount of visible light emitted by a light source.

Efficacy (lm/W):

Efficacy measures how efficiently a lighting source converts electrical power (watts) into visible light (lumens). Higher efficacy indicates better performance. For example, LEDs can exceed 150 lm/W, whereas traditional incandescent lamps (GLS) offer around 10 lm/W, and compact fluorescent lamps (CFLs) about 60 lm/W.

Lux (lm/m²):

Lux is the unit of illuminance and indicates the amount of luminous flux distributed over a given area (lumens per square meter). Different applications require different lux levels; for instance, task-oriented areas such as kitchens or sewing stations demand higher lux values than general areas like corridors or lobbies.

Correlated Color Temperature (CCT, °K):

CCT describes the color appearance of a light source, expressed in degrees Kelvin (K). Light can range from warm (yellowish), to neutral (off-white), to cool (bluish white), depending on its temperature rating.

Color Rendering Index (CRI):

CRI measures the ability of a light source to render colors accurately compared to natural light. A high CRI (close to 100) indicates that objects appear more true to life, similar to how they would look under sunlight. A lower CRI may cause colors to appear distorted or unnatural.

Beam Angle:

Beam angle refers to the spread of light emitted from a source. A narrow beam (e.g., spotlights) provides focused illumination, ideal for highlighting specific features. A wider beam is better suited for general lighting, creating a more diffuse and ambient effect.

What is LED Lighting?

LED lighting refers to the use of Light Emitting Diodes (LEDs) as a source of illumination. An LED is a semiconductor device that emits light when an electric current passes through it. Unlike traditional lighting technologies such as incandescent or fluorescent lamps, LEDs do not rely on filaments or gas discharge to produce light.

LED lighting is known for its high energy efficiency, long lifespan, durability, and low maintenance requirements. It is available in a wide range of color temperatures, intensities, and form factors, making it suitable for a variety of residential, commercial, and industrial applications.

Benefits of LED Lighting

a. Energy Efficiency:

LEDs consume up to 50% less energy than CFLs, resulting in substantial energy savings and lower electricity bills.

b. Long Lifespan:

LED lights have an exceptionally long operational life, often exceeding 50,000 hours, which greatly reduces maintenance and replacement costs.

c. No Harmful Emissions:

LEDs do not emit ultraviolet (UV) or infrared (IR) radiation, making them safer for sensitive materials and human health.

d. Environmentally Friendly:

LEDs are free from hazardous substances such as mercury, making them a safer and more eco-friendly lighting option.

e. Versatile Color Options:

LED technology allows for the production of millions of color variations, enabling dynamic and customizable lighting solutions for various applications.

How LEDs life is defined?

Unlike conventional lamps that tend to fail suddenly, LEDs gradually depreciate in light output over time. The lifespan of an LED is typically defined by the point at which its luminous flux decreases to 70% of its original output—commonly referred to as L70. This gradual decline ensures more predictable performance and allows for timely maintenance or replacement planning.

Significance of 50000 hrs life

4 hr daily operation : 34 yrs

8 hr daily operation : 17 yrs

12 hr daily operation : 11 yrs

24 hr daily operation : 05 yrs

Challenges with LED Lighting

LEDs are very sensitive to temperature & also produce a lot of heat during operation. This heat should be removed from system to maintain the junction temperature within prescribed limits.

LED are point sources so are prone to cause glare if the optics is not properly designed.

What is the role of heat sink?

Heat sink is required to dissipated heat generated by LEDs during operation. Since ambient temperature in India varies from – 5 0C to + 55 0C so the heat sink design should ensure effective thermal management under all circumstances. It should be made of high grade aluminum & should have no pores (like in gravity die cast heat sinks) providing resistance to heat flow. Garnet uses aluminum pressure die cast or extrusion heat sinks.