Energy Efficient Lighting   

LED Downlights FAQs  

Q1:  Which LED is a direct replacement for a 50 Watt Halogen downlight?   A:  Although LED lighting cannot really be directly compared to a 50W halogen, the amount of light equivalent to a 50W halogen can be found in a 6 Watt Downlight Bulb.  Why not convert your MR16 fitting to 240V GU10 for energy savings and better LED longevity.

LEDs Interesting Facts

  Mozzies, bugs and beetles don't buzz around LEDs   If you turn on a light at night you will have noticed that it is magnet for bugs. This is because most LED bulbs do not emit wavelengths in the UV spectrum like incandescents or fluorescents do (except for UV LEDs which are made for specific purposes, such as curing dental materials, treating skin conditions etc.)   LEDs mimic natural light   LEDs operating in the colour temperature range we call "Pure White" (5800 to 6200 Kelvin) provide Full Spectrum Lighting the closest thing to natural sunlight without the harmful UV rays.   LEDs don't get hot   The highest temperature good quality LEDs will reach is around 55C compared with Halogens which get to more than 395 degrees Celsius   LEDs don't create harmful ElectroMagnetic Fields   LEDs operate on DC (Direct Current), meaning electric current flows in one direction only, creating a static electromagnetic field (EMF). Static EMFs are not linked to the health issues associated with AC lights and appliances.   LEDs have been around for a long time   The first LEDs were infrared.  They were developed in 1955.  White light LEDs were not developed around 1995.   LED stands for Light Emitting Diodes   If you want to sound as though you know what you're talking about, try not to call them "Leds". They are L.E.Ds.        

The Colour of Light

When it comes to LED lighting for the home, most people profess that they “don’t like that type of “cold”, blue light you get from LEDs”. They prefer a “warmer” light as it provides a “warmer” atmosphere, more appropriate for the home.   It’s funny because after 2 years of testing, comparing and running a range of LED lights both at home and at work, my partner and I have come to the conclusion that, compared with pure white LEDs, halogen and incandescent lighting appears “dirty” and “yellow”. Anyone notice the connection between colour and emotion?   Compared with the alternatives – halogens, fluoro tubes and CFLs, our pure white LEDs are easier to work under, computer eye strain is reduced and because these lights mimic natural, middle-of-the-day Australian spring sunlight, we are able to forget that we’re inside for 8 hours of the day. In fact, we feel that we could never again tolerate “warm” light on a 9 to 5 basis.   LED lights come in every colour of the rainbow. They’ve been used for decades in cars, boats and aeroplanes and for airport and shipping lighting. You can even get warm LEDs if you really want them. It’s a matter of selecting your preferred “colour temperature”, the standard unit for measuring the colour of light, as expressed in Kelvins (K).   Temperature Range for LEDs   Colour interpretation can vary from person to person and is influenced by experience and even emotion. The human eye cannot detect changes in brightness or colour temperature of less than 30%.   The colour description which we give to our LED lights refers to the following ranges:   * 4500K-5500K (Warm White)  * 5500K-6200K (Pure White)  * 6200K-7500K (Cool White)  * 7500K-10000K (Cold)   Incandescent and halogen lights tend to have a colour temperature of 3500 to 4500K, resulting in a yellowish light. (Incandescents can appear more white when their wattage is very high. Dimmers are used to turn incandescent high wattage light bulbs - 75 to 100W – from bright white light to warm light – while still drawing the same power).   Fluorescent tubes are mostly seen in supermarkets and commercial settings as cool to cold white but are also available as warm. Compact fluorescent lights (CFLs) are used mainly in restaurants and homes and are mostly available in warm colour temperatures.   White LEDs start at around 4500K and can be produced as high as 10000K. After 6500K, lights tend to appear cooler and brighter. Most commercial lighting is configured at around 7500 to 10000K. These lights can have slight blue tones to them and tend to be very bright.   Full Spectrum Lighting   When you strike the right balance of lumen colour rendering index (CRI) and colour temperature, you get light which mimics natural sunlight and is described as full spectrum lighting. Full spectrum light is believed to improve mood, work efficiency and help to reduce glare and eye fatigue. Natural sunlight helps to keep the stress hormone, cortisol in check and balances melatonin levels. People who work inside all day without full spectrum light or natural light are more likely to suffer from depression and insomnia.   Which white light is right for you?   We recommend pure white light for most applications in the home and at work. Cool to cold LED lighting is necessary for commercial situations where Australian standards apply. Yes, LEDs do produce a different type of light to that coming from halogens, incandescents and fluorescents but it won’t take long before you find them to be far superior to any other artificial light source. You won’t look bac

With Australians being forced to switch from incandescent globes to CFLs - Compact Fluorescent Lamps (those funny-shaped "Energy Efficient Bulbs") in November 2009, it's important to draw attention to environmental and health issues associated with CFLs.

LEDs Vs Incandescent, Halogen, Fluorescent & CFL Lighting

How lights work   Incandescent and halogen light bulbs create light by heating a filament inside the bulb. The heat makes the filament glow white hot, producing visible light. Using electricity to heat a filament to create light is a pretty inefficient way to make light and so a lot of energy is used and wasted in the process. Incandescent bulbs actually waste approximately 90% of the electricity they use to get hot and they do get incredibly hot.   Fluorescent light tubes and compact fluorescents bulbs use a gas (usually argon), mercury particles and phosphor to create light. The gas is excited by electricity, combining with mercury particles to produce invisible ultraviolet light. The UV light then hits the white, phosphor coating inside the fluorescent tube or bulb, causing it to fluoresce and emit white light. Because fluorescents don't use heat to create light, they are far more energy efficient than regular incandescent bulbs.   Don't flick the switch   However, fluorescents don't take kindly to being turned on and off frequently. They require a starter as well as a ballast to regulate the amount of electricity flowing through the tube or bulb, ballasts are subject to random failure and starters wear out with excessive switching. With time, phosphor levels drop off and the light becomes dimmer. Mercury is eventually lost, resulting in a dim pink glow.   Health concerns   There are also health concerns surrounding fluorescent lighting. Older style fluorescents tend to flicker at twice the supply frequency. This is not always apparent to the human eye but can still pose safety hazards in workshops, produce eye strain and headaches in students and officeworkers. Studies have linked this flicker to epileptic episodes and to repetitive movement in autistic children. Newer fluorescents don't produce visible flicker as they use electronic rather than electromagnetic ballasts. Both old and new styles give off more EMR (electromagnetic radiation) than LED lights.

Solution is to use a T8 to T5 adaptor with Viva-lite full spectrum tubes converting the old 50hz ballast into a 40 khz electronic ballast and saving up to 50 % energy at the same time with the benifits of natural light indoors.  LEDs   LED stands for Light Emitting Diode. Diodes are semiconductors, which will conduct electricity in only one direction. LED bulbs and tubes use diodes instead of gas or heated filaments to produce light making them the most energy efficient of all the lighting systems. LED lights do not require starters or ballasts and so are more durable and longer-lasting than their fluorescent counterparts. You can expect up to 50,000 hours from an LED.

 

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