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An Introduction to Downlights.

Downlights come in such a vast variety of shapes, sizes and colours, that there are definately enough downlights to suit every decore. If you can decide on the following options, then you have selected the correct downlight for you:

  1. Shape of the Downlight
    1. Round.
    2. Square.
    3. Rectangle.

  2. Type of Downlight
    1. Fixed.
    2. Gimble (also referred to as Tilt, this can be anywhere from 30-60degrees depending on the fitting.
    3. Snorkel (commonly used in Retail applications for Menu Boards).

  3. Colour of the Downlight
    1. White.
    2. Brushed Aluminium (also referred to as Satin Silver, Satin Chrome, Matt Chrome, Nickel and Satin Nickel).
    3. Polished Chrome (also referred to as Shiny Chrome).
    4. Silver.
    5. Anodised Silver (corrosion resistant, but inferior to 316L Marine Stainless Steel).
    6. Stainless Steel (varieties of Stainless Steel are 304 Stainless Steel and 316L Marine Grade Stainless Steel)
    7. Black.
    8. Beige (also referred to as Cream).
    9. Gold (also referred to as Brass).

  4. Mounting Type of the Downlight
    1. Recessed (also referred to as Flush Mounted).
    2. Surface Mounted.

  5. Location the Downlight will be placed
    1. Indoors - no humidity.
    2. Indoors - with humidity (eg. Bathrooms).
    3. Outdoors.

  6. Power Setups of the Downlight
    1. 12v Low Voltage Halogen.
    2. 240v GU10 Halogen.
    3. 240v CFL - Compact Fluorescent.
    4. 12v or 24v LED (also referred to as Light Emitting Diodes).
    5. 240v LED (also referred to as Light Emitting Diodes).
    6. Metal Halide (commonly used in Commercial and Retail applications).
    7. PLC (commonly used in Commercial and Retail applications).

  7. Is the Downlight Diffused?
    1. Glass Covered (Diffused).
    2. Not Glass Covered (Not Diffused).

Downlight Globes - Light Output Conversion Table.

The new generation of energy saver lamps are now readily being used in in all room of the home. More so, with the popularity of the common down light, compact fluorescent energy saver globes are becoming increasingly popular.down light fittings with the energy saving concious consumer.
Whether you are replacing or upgrading to CFL's (compact fluorescent lamps), the following information will assist you in deciding on the correct globe for your application.

Globe Type & Wattage
Equivalent in Halogen
*CFL 7w
30w
*CFL 9w
45w
*CFL 13w
50 - 60w
*CFL 14w
75w
*CFL 15w
75w
*CFL 17w
90w
*CFL 20w
100w
*CFL 25w
125w
**PLC 10w
60w
**PLC 13w
75w
**PLC 18w
100w
**PLC 26w
150w
Halogen 35w High Output
50w
Halogen 42w High Output
60w
LED 1w High Output
8w
LED 3w High Output
25w
LED 5w High Output
35w
LED 9w High Output
45w

*CFL is also referred to as Energy Saver Compact Fluorescent
**PLC conversions, are based on 4pin PL Lamps with G24q bases.


Downlight Globes - Technical Data Table.


Globe Type Globe Name Globe Wattage Globe Voltage Beam Spread Lumens Av. Life (Hrs)
Halogen MR16 - FNV 50w 12v 60 degrees n/a 5,000
Halogen MR16 - EXN 50w 12v 38 degrees n/a 5,000
Halogen MR16 - BAB 20w 12v 38 degrees n/a 5,000
Halogen MR16 - EXT 50w 12v 12 degrees n/a 5,000
Halogen MR16 - High Output 35w = 50w 12v 60 degrees n/a 5,000
Halogen MR11 - FTH 35w 12v 30 degrees n/a 3,000
Halogen MR11 - FTD 20w 12v 30 degrees n/a 3,000
Halogen MR11 - FG 10w 12v 30 degrees n/a 3,000
Halogen GU10 50w 240v 40 degrees n/a 5,000
Halogen GU10 35w 240v 40 degrees n/a 5,000
LED MR16 1w 12v 20 degrees n/a 20,000
LED MR16 1w - High Output 12v 20 degrees 50-60 50,000
LED MR16 3w - High Output 12v 45 degrees 85-115 50,000
LED GU10 1w 240v 20 degrees n/a 20,000a>
LED GU10 1w - High Output 240v 20 degrees 50-60 30,000
LED GU10 3w - High Output 240v 45 degrees 85-115 30,000
CFL GU10 13w 240v 90 degrees 420LM 10,000
CFL E27, B22, E14, B15 9w 240v n/a 540LM 15,000
CFL E27, B22, E14, B15 14w 240v n/a 850LM 15,000
CFL E27, B22 17w 240v n/a 1050LM 15,000
CFL E27, B22 20w 240v n/a 1300LM 15,000
CFL E27, B22 25w 240v n/a 1625LM 15,000
Metal Halide RX7s 35w 240v n/a 2900LM n/a
Metal Halide RX7s 70w 240v n/a 5800LM n/a
Metal Halide RX7s 150w 240v n/a 12000LM n/a
Metal Halide G12 35w 240v n/a 3300LM n/a
Metal Halide G12 70w 240v n/a 6500LM n/a
Metal Halide G12 150w 240v n/a 13500LM n/a
PLC 4Pin - G24q 10w 240v n/a 600LM 20000
PLC 4Pin - G24q 13w 240v n/a 900LM 20000
PLC 4Pin - G24q 18w 240v n/a 1200LM 20000
PLC 4Pin - G24q 26w 240v n/a 1800LM 20000

The above table is to be used as a guide only, and may vary without prior notice.


Downlight Globes - Let's Compare!


5 x 11w CFL 4 x 35w IRC Halogen 4 x 50w Halogen
Lifetime Hours 15,000 8,000 5,000
Purchase Cost* $100 $60 $40
Running Cost* $120 $350 $569
Total Cost* $220 $490 $669
Greenhouse gas emissions 803kg 2,336kg 3,796kg

*Over 10years. Based on usage of 4hrs a day. Purchase cost includes lamp cost and transformer for halogens. Operational costs and greenhouse emissions will vary with hours of usage, electricity rates and location. One standard bulb is compared with the minimum number of downlights required to light the average room.
The above table is courtesy of www.energyrating.gov.au.








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