Introduction
LED corn bulbs have rapidly gained popularity as a highly energy-efficient replacement for traditional high-intensity discharge (HID) lamps and sodium vapor (SON) lamps. But what makes these innovative bulbs so efficient, and how do they compare to their predecessors? In this comprehensive guide, we’ll explore the energy-saving benefits of LED corn bulbs, their ideal applications, and tips for selecting the best option for your needs.
What Are LED Corn Bulbs?
LED corn bulbs are designed with a large array of LEDs arranged on a metal structure, resembling a corn cob—hence the name. This design allows them to emit a substantial amount of light, making them suitable for high-lumen applications. They are a perfect replacement for HID and SON lamps, offering up to 90% energy savings while maintaining a broad color spectrum and exceptional brightness.
Where Are Corn Bulbs Used?
LED corn bulbs are versatile and can be used both indoors and outdoors in various settings that require powerful lighting. Common applications include:
- Car Parks
- Football Stadiums
- Street Lighting
- Roadways
- Interior High Bay Lamps
- Housing and Sporting Complexes
- Recreational Areas (e.g., Parks and Fields)
Their sturdy and splash-proof build makes them particularly effective for external applications where bright, reliable lighting is essential.
Metal Halide vs SON Lamps vs LED Corn Bulbs
Here’s how LED corn bulbs compare to traditional lighting options:
| Feature | Metal Halide | SON Lamps | LED Corn Bulbs |
|---|---|---|---|
| On/Off Cycling | 15-30 minutes to warm up | 5-10 minutes | Instantaneous |
| Ultraviolet Emission | Yes, requires a filter | Small amounts | None |
| Heat Emissions | Significant (10-15%) | Significant (15%) | Very little |
| Costs | From £22 | From £22 | From £22 |
| Average Lifespan | 6,000–15,000 hours | 18,000–24,000 hours | 50,000 hours |
| Colour Temperature | 2,700k to 20,000k | 2,700k | 2,700k to 6,500k |
| Energy Rating | C | B | A+ |
LED corn bulbs provide superior energy efficiency, a longer lifespan, and lower heat emissions compared to metal halide and SON lamps, making them a smart investment for long-term savings.
Corn Lights by Wattage, Lumens, and Colour Temperature
Selecting the right LED corn bulb involves understanding wattage, lumens, and color temperature:
| LED Wattage (w) | SON/MH Equivalent | Lumens (lm) | Colour Temperature (k) | Cap Type |
|---|---|---|---|---|
| 20w | 75w | 2,200lm | 6000k (daylight) | E27 |
| 30w | 105w | 3,200lm | 6000k (daylight) | E27, E40 |
| 40w | 150w | 4,200lm | 6000k (daylight) | E40 |
| 60w | 200w | 6,500lm | 6000k (daylight) | E40 |
| 80w | 250w | 7,800lm | 6000k (daylight) | E40 |
| 100w | 400w | 9,800lm | 6000k (daylight) | E40 |
| 120w | 400w | 13,000lm | 6000k (daylight) | E40 |
| 150w | 450w | 15,000lm | 6000k (daylight) | E40 |
| 200w | 600w | 20,000lm | 6000k (daylight) | E40 |
Retrofitting LED Corn Bulbs
Retrofitting LED corn bulbs can be complex, and it's recommended to hire a professional electrician. Understanding the different cap types (E27 and E40) and ensuring compatibility with existing fittings is crucial for a smooth installation.
