1. AS/NZS Certification
- Importance: Ensure the downlight meets AS/NZS standards 60598.2.2 for safety and performance.
- Verification: Check the Supplier Declaration of Conformity (SDoC) from your supplier to confirm compliance. Note that CE certificates and Chinese CCC certifications are not substitutes for AS/NZS standards.
2. Cut-Out Size
- Measurement: Measure the diameter of existing holes in your ceiling. Common sizes are between 90-100mm, but always verify before purchasing new downlights.
3. Light Colour
- Options: LED lights are available in different color temperatures:
- 3000K (Warm White): Ideal for lounges, hallways, and bedrooms.
- 4000K (Cool White): Suitable for laundries, bathrooms, and offices.
- 6000K (Daylight): Provides a bright, white light.
- Recommendation: Choose the light color based on the room and personal preference.
4. Lumens
- Brightness: For residential use, select downlights that produce between 700 to 1000 lumens for adequate illumination.
5. IP Rating
- Bathroom and Outdoor Use: Minimum IP44 rating is required to protect against splashing water. For areas with direct water exposure, IP55 or IP65 ratings are recommended.
- Product Example: 10W and 13W dimmable LED downlights are typically IP44 rated.
6. Insulation Contact Rating
- Safety: LED downlights should ideally be IC or IC-F rated, meaning they can be safely covered with insulation materials that withstand continuous exposure to temperatures up to 90°C.
7. Beam Angle
- Application: The beam angle affects how light is distributed:
- 35 degrees: Provides a focused spotlight effect.
- 90 degrees or more: Suitable for evenly lighting up larger areas such as living rooms.
- Preference in NZ: Recessed downlights are more commonly used than non-recessed ones.
8. Dimmable Options
- Compatibility: If you use dimmers, ensure to purchase dimmable LED downlights. These are generally 20% more expensive but offer compatibility with existing dimmer switches.
- Product Example: 10W and 13W dimmable LED downlights are available and compatible with most dimmers.
9. Quality
- Components: High-quality downlights should feature:
- Good quality drivers: Ensure reliable power supply.
- High-quality LED chips: Provide better light output and longevity.
- Effective heat transfer system: Prevents overheating and extends lifespan.
- Indicator: Heavier downlights often indicate better quality due to more substantial heat sinks (aluminum cups).
What are the advantages of using LED downlights?
Energy Efficiency: LEDs consume less power compared to traditional incandescent or halogen bulbs.
Longevity: They have a longer lifespan, reducing the need for frequent replacements.
How do I choose the right downlight size?
Choosing the right size depends on the size of the existing ceiling cut-out and the area you wish to illuminate. Common sizes include 90mm and 100mm diameters. Measure the existing cut-out before purchasing new downlights to ensure a proper fit .
What is the difference between IC and IC-F rated downlights?
IC (Insulation Contact) Rated: These downlights can safely come into contact with ceiling insulation, minimizing fire risk.
IC-F (Insulation Contact with Flammable Materials) Rated: These are designed to be covered and surrounded by thermal insulation and other flammable building materials safely .
