What is LED?

LED stands for Light Emitting Diode. Diodes are a semiconductor device that will conduct electricity in only one direction. The device is made-up of layers of silicon and seeded with atoms of phosphorus, germanium, arsenic or other rare-earth elements. The layers of the device are called the die and the junction between the materials is […]

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Power Factor – The Reality

Republished with permission from the Author – Rod Elliott Introduction Based on the number of emails I receive and the astonishing number of websites that provide erroneous or inaccurate information, power factor must be one of the least well-understood concepts in the electrical field. I have seen weird analogies with horses pulling rail carts, glasses […]

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Colour temperature & the Kelvin scale

LED colour temperature measures the colour of a light source. It defines the amount of yellow, red and blue in a light, or how these hues differ from a true white colour, making it more ‘warm’ (yellow end of the light spectrum) or ‘cool’ (the white through to blue end of the spectrum.) Color temperature […]

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IP Ratings for light fittings

IP ratings classify the level of protection each lamp or complete fitting can provide against solids, including dust particles, and liquids, including water. The IP Rating or International Protection Rating or Ingress Protection Rating defines the level of protection that all electrical appliances provide against the intrusion of solid objects, dust, accidental contact, and water. […]

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What lighting levels do i need?

The Australian standard for required workplace illumination AS1680.1.2006 offers the following advice: Class of Task Recommended Maintained Illuminance lux Characteristics of the activity / interior Representative activities / interiors Movement and Orientation 40 Interiors rarely visited with visual tasks limited to movement and orientation Corridors, cable tunnels, indoor storage tanks; walkways Rough Intermittent 80 Interiors […]

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