Colour Temperature – Warm White vs Cool White

Image displaying colour temperature

Have you ever changed a blown lightbulb and noticed that its replacement does not match the colour of light that it gives off? What once was a nice warm glow has now become a harsh white light and all of the sudden the room no longer has the same ambience and feeling. Or when your white lit, modern kitchen now has a yellow tone that doesn’t accurately highlight the area! It’s because there is a whole colour spectrum of lighting based on colour temperature.

It’s understanding this temperature that makes it easier to choose a light that will give off the look and feel that you want in your room. But why is it that some bulbs glow a bright white, while others emit a warm orange?

Continue reading

Light Pollution – What Is It and How Can You Help?

Light pollution

Have you ever noticed how when you are away from heavily populated areas that the night sky is filled with stars? So why is it that you can’t see the same stars when you are in the city? The answer is light pollution! Thats right, light is considered a pollutant!

Light pollution is the obtrusive, excessive and unnecessary use of light used for advertising, security, street lighting, etc. that becomes misdirected and filters out towards the sky. This misdirection is due to poorly designed lighting installations and can be an issue for more than one reason. There are three different types of light pollution that occur as a result of poorly designed lighting:

Glare Light

Glare is caused when the excessive brightness of a light causes light scattering in the eye and reduces the contrast of what the eye can see. This reduced contrast can make it extremely difficult to distinguish scenes and settings and can be extremely hazardous when driving.

Glare light towards the eyes can cause temporary blindness and constant exposure to glare can have longer effects on the health of your eyes and it can worsen with age.

Light Trespass

Light trespass is the unwanted light entering a property where it is not needed, for example, street lights entering through a bedroom window at night. Not only can unwanted light be annoying while you are trying to sleep, but having a disrupted sleep can also be damaging on your health.


Skyglow is when the overflow of many sources of lighting brightens the sky over inhabited areas. In other words, when there are too many bright lights outdoors in one area, it can illuminate the night sky. This form of light pollution is of greatest concern to astronomers who study the night sky. The brighter the skyglow, the lighter the night sky and therefore the less celestial objects can be seen and studied.

The Effects Of Light Pollution in South Australia
The Density Of Light In South Australia

Why is light pollution bad?

First and foremost, light pollution is a large form of energy wastage. Lighting that emits too much light or is focused when and where it is not needed (i.e. upwards towards the sky) can have large economic consequences, as the wasted energy that is used to produce this light can contribute heavily to greenhouse gases and unnecessary expenditure.

Light pollution can also have environmental consequences and can be detrimental for both flora and wildlife that inhabit the areas.  All living  creatures rely on the steady rise and fall of the sun to regulate body patterns and quality of life. Their natural migratory and breeding patterns can be affected along with their ability to interact with one another.

As the rhythm of life is dependent and coordinated by the natural rise and fall of the sun, disrupting the pattern can severely impact the ecological behaviour.

The health of humans can also be affected by light pollution for almost the same reason. When we are exposed to larger amounts of light when we shouldn’t be, such as at night when we are trying to sleep our melatonin levels are suppressed. This can lead to many different issues such as sleep disorders, lowered immunity levels and increased levels of anxiety.

The Effects of Light Pollution
An Example Of How Light Pollution Affects Visibility Of The Sky At Night

What can be done?

While it is understood that there are necessary reasons that areas need to be lit up during the night, such as for safety on the streets and the ability to see in the dark, there are ways that it can be reduced around the home.

  • The most obvious way to curb your contribution to light pollution around the home is to switch off lights when they are not needed. Do not light up your front and backyard when they are not in use. This will also save you a large amount of money on your energy bills!
  • Have a motion sensor installed to switch your outdoor lights on and off when appropriate.
  • Replace your high-energy bulbs with much more energy efficient LED ones to reduce the carbon emissions that are being discharged.
  • Properly shield outdoor lights to focus the light where needed and avoid any misdirection.
  • Use dimmers where possible to control the amount of light that is being released.
Properly Shielded Lights Can Correctly Control The Direction Of Light
Properly Shielded Lights Can Reduce Light Pollution

Solar Myths Busted

Solar panels installed on a home in Adelaide


Solar Myths Busted!

Do you want to have a solar PV system installed, but are slightly skeptical because of something that you may have heard or possibly some general misunderstandings that you may have? There are so many different opinions on solar PV systems and so many myths, so Green Efficient Living has decided to clear up a few up in order for you to make a clearer decision. Here is the truth about a few solar myths that you may have heard that could be holding you back from enjoying all of the benefits that solar has to offer.

“The solar system that I am offered must be the right one for me!”

Unfortunately, this isn’t always true. There are many different solar systems out there and many different solar installers, and while the industry is one that is heavily regulated with strict compliance standards, it is still up to you to do the research and find the most trustworthy installer that will provide you with the most suitable system.

A reliable solar technician is one that is also a qualified electrician, giving them the sound knowledge and understanding of how to correctly wire the panels to ensure their efficiency, reliability, and safety. Your energy consumption habits, your location, your roof pitch, your needs, etc. will all need to be reviewed before they can even begin to understand what the correct system might be. If they are offering you a system before these questions have been asked, then the chances are that they are offering you a system for their benefit and not yours.

Never pass up the opportunity to have your system inspected. Through inspections carried out by Green Efficient Living, it has been found that a large number of systems are non-compliant which a high percentage of them being sub-standard. It is for this reason that your own research is extremely important to ensure that you are dealing with a reputable company. It is important to that you are aware of whether or not your solar installer is approved – a good company should always be able to provide proof of quality. Asking for their accreditation and certification is one way to ensure that you are dealing with a reputable company.

It is also important to be aware of what is available to you once the system has been installed, such as warranties, after-installation support, maintenance checks, and customer service. A quality provider should be with you long after the system has been installed.

Don’t get caught by hidden costs – ensure that you are aware of everything that you are paying for! Some companies may charge you for small things such as your meter box upgrade, so make sure that you have every little detail written in full and provided to you for your own personal records.

Green Efficient Living are Clean Energy Council approved installers and all of our technicians are qualified electricians. We only use quality components and products that are guaranteed to deliver and make you aware of every cost involved in the installation.

We take pride in our work so you know that you are getting the best possible service before, during and after your system has been installed.

“I’m not home during the day, therefore, solar panels won’t benefit me!”

It is true that unless you have a battery system installed, you cannot store the enery that your system produces to use at a later time. As a system’s energy production is highest during the day, this is ultimately when you need to be utilising it. Although most families of individuals are not home during daylight hours, there are still a number of ways that you can benefit from solar panels. It just means that you will need to change your energy consumption habits to match that of the solar energy production. Try to find ways that you can use the majority of your electricity usages during the day. Instead of waiting until you are home to turn on and use your appliances, schedule them to come on while you aren’t home. Have your washing machine run its cycle, and then your dishwasher, etc. This will ensure that you are making the most of your energy that is being produced and reducing your electricity bills in the process.

Also, remember that weekends are two days out of the week when you are home during the day to utilise the energy products. Even if your solar energy production is only able to make up a slight amount of the energy needed to run your appliances, you are still benefiting from having solar installed.

“I don’t need to worry about using all of the energy that my system produced because I’m being paid for the energy that I don’t use!”

This is true, but it is also slightly naive. Long gone are the days of high feed-in tariffs (what you get paid for the elecricity that you send back to the grid). Currently, this rate is at $0.068 per kilowatt hour (kWh), so for every kWh of solar that you don’t use, is sent back out the grid and you are reimbursed $0.068. For such a small amount, it is far smarter to try and utilise every kWh that you can, by timing your appliances to come on when energy production is at its highest. By using your solar, you’re saving yourself from having to purchase it from the grid at approximately $0.32 per kWh.

Residential Off grid solar system
Solar Power for Home

“Solar panels only produce energy on warm, sunny days so they aren’t really worth it!”

The myth that solar panels aren’t effective on cloudy or overcast days is one that has been argued for a long time now. Solar panels rely on light (UV rays) and not heat to produce energy, so as long as light is hitting the panels, there will be energy production – the amount, however, varies.

A study by the CSIRO is 2012 found that although cloudy weather can reduce energy production, they are still able to generate as much as 25 percent of the output that they would on a sunny day. Take Germany, for example – despite being a country that experiences a lot of cloud cover, they are currently one of the world’s top solar energy producers.

But, there is no such thing as a ‘shade-tolerant’ solar panel, although some solar panels deal slightly better under different shading conditions. These conditions can be quite complicated and it is dependant on how the shade falls over your panel, i.e. does it fall in a horizontal or vertical line, is the shading diffused or concentrated? But the long story is, if your panel is shaded, it will produce less power.

Many people also think that the warmer the temperature, the more energy is produced as a result. However, with all solar panels, their electricity production decreases as the temperature increases. Instead, the perfect weather for producing maximum solar energy is a day that has maximum sunlight (minimum cloud cover) and cooler temperatures.

“A solar system requires far too much maintenance!”

Solar systems contain no moving parts and are therefore very reliable and self-regulating – so much so that it is quite easy to forget that you can even have a solar system installed! For this reason, the system requires very little maintenance and effort on your behalf. But while this may be the case, it is important that you remember to complete a few easy tasks every now and then to ensure that your system is running smoothly and providing you with all of the benefits.

Despite what you may have heard, no solar panel is self-cleaning. Just think, if there was self-cleaning, non-stick glass, wouldn’t you have it on the windscreen of your car? If you can see your panels when you are standing outside, take a look to see if there is any dirt or debris sitting on the surface that may be covering them slightly and run water over them as needed to clear it away. How often you need to clean your panels is also dependant on the area in which you live. Near coastal, salty or farming regions or industrial areas will require you to clean your panels more often as there will be a faster build-up of grime. It is also wise to make a habit of taking a look at your inverter each time that you walk past it to ensure that it is running as it should be and that your energy production is still at its highest. Lastly, trim back the surrounding vegetation that may cause shading and therefore reduce your panels’ production.

If you have experienced wild weather, call an expert to have your panels inspected for any damage and professionally repaired as needed. Making these few rules a habit, along with having your panels professionally inspected once a year, is all the maintenance that a solar PV system requires for it to continue working at its best.

“I won’t be living in my home long enough to repay my investment!”

This is up to personal opinion, but at the end of the day, having solar installed on your home is beneficial both while you are there, and when you decide to leave. Statistics show that panels pay for themselves within six to fifteen years, depending on the type of system that you have, your location, your energy consumption habits, etc. In addition to this, a study has revealed that 85% of Australian home buyers believe that a house with a solar system installed has an increased value and three-quarters of renters would pay higher rent to live in a home with solar energy(1).

So even if you are not planning on living in your home for the next fifteen years at most, you are reducing the amount that you are spending on your electricity bills while you are there and increasing the value of your home when it is time to leave. 

Residential Off grid solar system
Solar Power for Home

“My roof doesn’t face North so my panels won’t produce enough energy!”

There are two key factors in the positioning of solar panels that determine the maximum output of energy that can be produced by your system – direction and tilt/angle.

As Australia is in the southern hemisphere, we experience a sun that is predominantly from the north. Therefore, for your house to receive the maximum amount of sunlight, your panels should face north. In Adelaide, it has been found that panels that do face true north, at 30 degrees tilt, work at 100% efficiency that decreases by 10-20% if they face east (84% efficiency) or west (86% efficiency)(2).

Do not worry too much if your panels cannot face true north, as there is always other options. In this situation, it is best to have them north-east or north-west, with the angles of the panels being the main focus, to maximise the amount of sunlight that they can receive. The optimal direction of the panels also depends on what time your family uses the majority of your electricity. For example, you and your neighbour may have the exact same house design, facing the same direction, however your neighbour is retired and home for most of the day and will benefit more from having his panels face true north. You on the other hand have a young family, and are out the majority of the day. You therefore, would benefit more from having your panels facing east and west.

So just because your panels may not have the perfect placement, it does not necessarily mean that it will be detrimental to your output. It may in fact, work in your favour. If you are thinking about having solar installed, but are unsure if your location and roof will allow for optimum placements, speak to an expert at Green Efficient Living today and allow them to professionally design you a system that will produce the greatest yield.

“My panels are made in Germany, so they must be the best on the market!”

Firstly, a few things must be clarified before we can continue. Are your panels MADE in Germany, or are they just supplied by a German company? The difference between the two will distinguish just how superior they are. Germany holds the title for being able to produce the highest quality panels on the market and have a strong reputation in the solar industry. If you buy a genuine German-made solar panel you can almost guarantee that they will be of a high quality. But the line between what is German-made and what isn’t is a little blurry.

There are a few companies out there that maintain that their panels are made in German simply because that is where their distribute them from, but a lot of these companies still use Chinese manufacturers to produce their modules. This misleading branding is easy to believe and causes a lot of confusion about the quality of their products.

In saying that, it does not mean that panels made in China are necessarily of a lower qualitt. The only way to know whether you are truly choosing a reputable company with high quality and high performing panels, is to do your research and choose one that is classifed as Tier 1.

Green Efficient Living only use Tier 1 panels and high quality components so you know that your home system is designed to last. We only use brands that we would use, and have used, on our own homes, so you can rest assured that we are supplying you with the best.

If there is anything else that you are still unsure about regarding a solar PV system, give Green Efficient Living a call on (08) 8297 3422 for more information.

  1. H. Jones, 9 May 2015, 85% of Aussies say solar panels boost property prices, <>.
  2. Clean Energy Council System Design Guidelines.

Small Tips To Save On Your Power Bills

Overloaded Powerboard

Are you finding that your power bills are consistently too high and you’re unsure why? There are a few small changes that you can make around your home that won’t cost you an arm and a leg but can make a dramatic difference to how much you are spending on energy. The main reason that most households have a high energy bill is because they don’t completely understand their energy usage, and as Green Efficient Living are passionate about educating people to be more energy smart, we have decided to compile a list of ways to easily reduce your energy usage around the home.


Did you know that even though you’ve turn your television off after you’ve finished watching it, it is still consuming energy? It’s called ‘Vampire Power’, ‘Phantom Load’ or most commonly ‘Standby Power’ and has a significant impact on household bills. According to the Department of Industry, Innovation and Science, standby power makes up approximately $100 of energy consumption costs per year for the average household. Plasma and LCD televisions are large consumers of standby power and Energy Rating states that every television that is sold or supplied within Australia must display an Energy Rating Label. This will tell you how much energy the television uses per year and gives you a star rating allowing you to compare the energy efficiency of different models.

But the biggest way to reduce your standby power costs is by unplugging your appliances, or turning off at the switch, once you’ve finished with them. Take a look around to see if any of your appliances have standby lights or are warm even when not in use, and make an effort to correctly turn them off so that your house isn’t consuming energy unnecessarily.

How power boards affect energy usage


The lighting around your home can be a culprit for many reasons and there are a few ways that you can be smarter when it comes to your lights.

  • The most obvious way to save energy is to turn off the lights in rooms that are being used – don’t believe the myth that is uses more energy to turn lights on and off every few minutes. This is rarely the case and only applicable if you have large spotlighting or OLD fluorescent lights that take longer to warm up once switched back on.
  • Avoid using your heat lamps in your bathroom if you are only after light, because while the difference in energy usage isn’t too vast for short periods of time, it can add up when the bill arrives.
  • While energy efficient fluorescent globes may be slightly more expensive to purchase than your traditional incandescent globes, they use 80 percent less energy, are longer lasting, and are therefore the much smarter choice when it comes to saving energy around the home. They are perfect for areas where the lighting is needed for longer periods of time, such as the kitchen and living areas, and have a much longer lifespan, so the number of times you will need to change them decreases. Switch to save!
LED Lighting's affect on energy bills
Image by Justin Sullivan/Getty Images


Dishwashers, washing machines and clothes dryers are some of the biggest culprits of energy wastage around the home because people don’t understand how to use them efficiently.

  • When using your dishwasher, ensure to use the economy setting if it has one, and only turn it on when it is full. This is much the same as the washing machine, in that it should only be used once you have a full load, and all clothes should be washed in cool water to save energy heating it up.
  • If you can, avoid using your clothes dryer and line dry instead. But if you need to, make sure that your clothes have been wrung out as much as possible to minimise the time needed in the dryer.
  • As your fridge is continuously running, always make sure that the door is sealed tight and that the unit has at least a 5 centimetre space surrounding the unit to allow air to circulate freely. If you can, set the temperature of the fridge at a consistent 3 to 5 degrees Celsius, and -15 to -18 degrees for the freezer.


  • For Reverse Cycle Air Conditioners, keep the rooms that are not in use closed off, to keep the rooms that you are using cooler, and always keep your air conditioner filters clean.
  • Always close your windows and blinds in hot weather to reduce the amount of thermal ingress from outside. This will ensure that your air conditioner does not have to work as hard to keep the room cool.
  • In winter, close doors to rooms that you aren’t using to keep the heat in the rooms that you are and try to use extra blankets, wheat bags, or hot water bottles when sleeping to avoid running your heating in your bedrooms.
  • Keep your fan speeds consistent and always use the right settings for the right occasions.

For more tips on how to be energy smart when it comes to your air conditioner or heater, see here.


When attempting to cut energy costs, many people don’t necessarily look to their water consumption as a solution, but there are many ways that changing your water usage patterns can help shave dollars off of your bills. According to Energy.Gov water heating is the second largest energy expense in your home and therefore can result in large changes to your spending.

  • In the bathroom, changing your shower heads to energy efficient ones can save up to $200 a year on your energy bills.
The higher the water rating, the less energy is used
Before buying an appliance, look at their water rating to see how efficient they are. The less water that they use, the less heating is needed, and the more energy is saved.
  • Making the effort to have much shorter showers is also a way to cut energy costs, less water used = less energy needed to heat it.
  • When boiling water, opt for the kettle rather than the stovetop and keep lids on when cooking to reduce cooking time
  • Fix those leaky taps!

As you can see, there are many small and cheap ways to reduce your energy bills by a large amount. Start implementing these tips into your everyday life and watch the savings pile up! For further information on how to save energy, call Green Efficient Living today on (08) 8297 3422.

How To Use Your Air Conditioner More Efficiently

Wall Split Air Conditioning Unit

We all want to be cool in summer and warm in winter and we don’t want to have to compromise on that. So when the temperature outside starts rising, we expect more from our air conditioners and turn them up just that little bit more until we are comfortable. However, energy prices are rising and we need to understand how to be more energy efficient when it comes to using our air conditioners.

Continue reading

The Unfamiliar Roles That Lighting Plays In Our Lives

Industrial Lighting in a cafe

Lighting isn’t just about helping you see in the dark, or illuminating a space. The truth is that lighting has a much greater impact on ourselves as individuals and our everyday wellbeing than we think. There has been a large amount of time dedicated to studying and researching just how much of an impact lighting plays in our lives from our health and wellbeing to our productivity levels in both the home and office. For exactly how to light up your life – read on.

Continue reading