Outdoor lighting can be used in several different ways benefit a home. When combined with the use of a Clipsal Sensor it can help light up the pathway upon your arrival home or activate the lights when any unwanted guests arrive. The Clipsal brand of sensor lights provide sensor models that will detect motion in a 90 degree field of view of the sensor. They can also detect movement at 110 degrees and even 360 degrees. The sensor type depends on the application. Clipsal lights work using passive infrared and ultrasonic waves to detect movement. Once movement is detected, the lights that the sensor is connected to will turn on.
I'm a big fan of garden spike lights. Extremely easy to install and they look great of an evening. A great option with them is to have them on a timer so they only come on between set hours, say 6pm to 10pm. It might seem a waste of power when nobody is home but it will act as added security by letting intruders think someone is home. To help bring the cost down you can always put some LED lamps in too.