Lighting : Lighting August 2015 - Vol 35 Issue 4
38 LIGHTING MAGAZINE | August/September 2015 7. HAS THE LUMINAIRE BEEN REGISTERED WITH AN APPROVED STATE GOVERNMENT REBATE SCHEME? LED luminaires registered with a state government scheme have had their product testing scrutinized before approval. This is independent of the manufacturer. Users can check the product listing online on each of the NSW and Victorian government schemes: z IPART – www.ess.nsw.gov.au z VEET – www.veet.vic.gov.au z Other schemes: Commonwealth Emissions reduction fund, ACT, South Australia, SE Queensland. Note each scheme is different. 8. LUMEN MAINTENANCE – LONGEVITY (NOT LUMINAIRE LIFE) The light output of all light sources depreciates with use. Lumen maintenance is the term used when measuring this decay. For LEDs the lumen maintenance (L70) value is a prediction of the number of hours an LED light source will operate before its light output falls below the point at which the decay is easily noticed; the value is 70% of initial light output. It corresponds to the practical end-of-life for the LED chip itself. While many use the L70 value as the life of the luminaire since it is expressed as a large number, for example 50,000 hours, it is not luminaire life. Luminaire life is determined by the weakest component – perhaps the power supply or failure of water proofing. Luminaire life may be considerably shorter than the L70 value claimed. Users can verify the lumen maintenance L70 claim by requesting a copy of the TM-21 report. 9. CORRELATED COLOUR TEMPERATURE (CCT) Colour temperature describes the colour appearance of light and is measured in degrees Kelvin (K). It is an indication of how good an object’s colour appears under the light. Colour temperatures recommended for different interior lighting applications are shown in AS/NZS 1680.1*. z 3000K is considered a ‘warm’ colour z 4000K is ‘neutral’ or ‘cool white’ z 5000K is a ‘cold’ or daylight colour The LM-79 test report or SSL label will show the CCT. 10. COLOUR RENDERING INDEX (CRI) is a measure of the colour appearance of objects. A CRI of 80 or higher is used in most indoor applications. The LM-79 test report or SSL label will show the CRI. 11. WARRANTY Warranty is a voluntary promise and is a measure of a manufacturer’s confidence that the luminaire will achieve an expected life. Users should research the company offering the warranty (will they exist in five years?) and understand the fine print. Be cautious of long warranty periods. Refer www.accc.gov.au for information on consumer rights, guarantees and warranties. Ask the supplier to provide you with a Warranty Statement 12. COMPONENT COMPATIBILITY FOR DIMMING, CONSTANT ILLUMINANCE, COLOUR CONTROL Compatibility with, for example existing or new dimming equipment to avoid non-operation, start/stop dimming or flicker is a real issue. Some LED features that require good compatibility include: z Constant light output to ensure the light output remains constant as the LED ages z Colour change during dimming to match the 2700K to 1800K colour change when dimming incandescent lamp z Colour change capabilities User should check if the supplier provided detailed product feature, operation and compatibility information? 13. INSTALLATION Reputable manufactures provide information and guidance to facilitate correct product installation. Verification – is there a detailed supplier’s installation data sheet? 14. ELECTRICIANS Electricians are responsible for installation safety. They are required to only install compliant product. Verification - all of above may be required. For further information see: A Simple Question – DOES IT COMPLY?* www.doesitcomply.com.au *DOES IT COMPLY? Is supported by Lighting Council Australia, Standards Australia and other organisations. FINE PRINT The electrical safety regime in Australia is in transition. The National Database is increasingly listing suppliers and Certificates of Approval (CoA). If the supplier or supplier’s CoA is not listed, ask why not. The CoA issued by the NSW regulator is required to show the issued approval number as Nxxxxx LM-79, LM-80 and TM21 are methodologies developed by the Illuminating Engineering Society of North America. They have become default world standards for testing and assessing various aspects of LEDs. LM-79 provides internationally accepted procedures and precautions for performing reproducible photometric, colour and electrical characteristics on complete LED luminaires. LM -80 provides test criteria to measure lumen depreciation of LED light sources, arrays and modules (but not luminaires). TM-21 is a mathematical method based on LM-80 data to make a lumen maintenance projection.
Lighting June 2015 - Vol 35 Issue 3
Lighting October 2015 - Vol 35 Issue 5