Energy efficiency is now a necessity and with good reason. Energy-efficienct lighting reduces your energy costs and lessons the burden on nonrenewable energy sources. Energy efficient lighting does not mean you are limited in your choice of light fittings or light levels. Talk to us at Larkin Electrical about energy assessment, implemention and reducing your energy costs. By making simple changes to your lighting in your indoor and outdoor environments, combined with intelligent design we at Larkin Electrical guarantee a more energy efficient home.
Types of Lighting
In the search for energy-efficient lighting, LEDs have proven to be the most efficient bulbs available. Good quality LEDs use at least 85 percent less energy than traditional incandescent and halogen bulbs, and last up to 25 times longer. Recent advances in LED technology have greatly increased both light output and efficiency.
LED stands for "Light Emitting Diode." A diode is a solid state electrical component with two terminals that conduct the electricity only in one direction. When an electric current is applied to the LED , electrons pass from the anode to the cathode, dropping suddenly to a lower energy state. This sudden change in energy state causes the electron to give off a photon. As a result the diode emits light. A lens is used to gather and focus the light in the targeted direction. The LED does not emit great amounts of heat and there is no filament to burn out.
Cost Comparison:- LED v. Halogen downlight
Typical residence with 20 downlights
Halogen 50 watts LED 9 watts
Total Watts 1000 220
Yearly runnung cost @ 8hrs/day,(22c kWh). $642 $141
Power saving after 1yr $0 $501
Power savings after 5yrs $0 $2505
Maintenance, lamp replacement
at 3000 hrs $600 $0
Typical cost over 5yrs Halogen $3810 LED $705
Total savings over life of LED Downlights (50,000hrs) equals $8578!! - assuming same power price.
A halogen lamp, also known as a tungsten halogen lamp, is an incandescent lamp with a tungsten filament contained within an inert gas and a small amount of a halogen such as iodine or bromine. The combination of the halogen gas and the tungsten filament produces a chemical reaction known as a halogen cycle which increases the lifetime of the filament and prevents darkening of the bulb by redepositing tungsten from the inside of the bulb back onto the filament.
Low-voltage halogen downlights are the most commonly used lights in domestic and commercial Australia. Although lower voltage is used, they are not energy saving. They use roughly the same amount of energy as a 60W incandescent bulb. But as they are connected directly to a transformer, they can be replaced with LEDs. Refer to the above comparison chart.
An incandescent light bulb is an electric light which produces light with a filament wire heated to a high temperature by an electric current through it, until it glows. Widely thought to have been invented by Thomas Edison in the late 19th century, the first incandescet lamp was demonstrated in 1802 by Humphry Davy and has been continually improved upon by many others since.
Approximately 90% of the power consumed by an incandescent light bulb is emitted as heat, rather than as visible light. AUSTRALIA is leading a global revolution in banning the sale of incandescent light bulbs in favour of more energy-efficient lighting. The phase-out will deliver considerable savings to the environment and the economy. This means you are no longer able to purchase standard incandescent bulbs.
CFL - Compact Fluorescent Lamp
A CFL is a fluorescent lamp designed to replace an incandescent lamp, which in most cases, fit into light fixtures formerly used for incandescent lamps. The lamps use a tube which is twisted or folded to fit into the space of an incandescent bulb, with a compact electronic ballast in the base of the lamp. They are now common in most Australian homes.
12V - low voltage
Low voltage means there's a transmitter, and [the electricity is] being transformed so the 120 volts is being brought down to 12 volts. Some chandeliers are low voltage. A lot of downlights are low voltage. Task lighting, desk lights are low voltage sometimes as well. Low voltage uses smaller lightbulbs, so you can have more compact fixtures. There's a type of lamp called an MR16, which is used in downlights, and the great thing about MR16s is they make incredible variety of beam spreads. So if you want to have a really super narrow spot or if you wanted to have a big, wide flood, they've got that and everything in between. The low-voltage light bulb has between a 2,000- and 3,000-hour life, but the trend now is to replace them with a LED which has a 10,000- to 100,000-hour life.