Pulsar Knowledge – What is Colour Temperature?
Pulsar Knowledge - Colour Temperature Series Pt. 1 What is Colour Temperature? Colour temperature is a way to measure the colour of the colour of white light. But wait, isn’t white light just one colour? The short answer is no. In the 17th century, Isaac Newton showed that white light is a combination of many different colours. Later, Max Planck, another physicist, showed that the exact mix of those different colours is determined by temperature. White light comes in many different shades, from the warm glow of a fire or tungsten bulb to the cool clarity associated with daylight, or a laboratory. Here, temperature refers to how hot you’d have to heat up a material (this could be a filament) to create that specific colour of white light. Lower colour temperatures tend to be closer to amber, and higher colour temperatures become bluer. Why do we consider these colours to be white, rather than amber and blue? This is simply because these light sources still
Students Create Dramatic Lighting at Caerphilly Castle
Caerphilly Castle - Illuminating an Iconic Structure Lighting Design students at the University of South Wales caused a stir on the 17th & 18th November, by illuminating the stunning exterior of Caerphilly Castle. The exciting lighting display ran alongside CADW film nights, which take place at the castle annually. The event provides a unique opportunity for students of the university to plan and execute a large-scale lighting project. The brief from CADW was to create a gothic feel with lots of imagery, and a focus on the colour red. To achieve this, the students planned to light the front of the castle in red, and to use custom gobos, and specific lighting states, to complement each film. The students used a range of lighting equipment to bring this vision to life, including Pulsar ChromaStrip 25 linear fixtures. Lighting student Josh Hill described the approach taken by the team. ‘Each film had its own state with unique colours to accent the text. We
5 Key Considerations for any Architectural Installation
5 Key Considerations for Any Architectural Lighting Project 1. Aesthetics The most important aspect of any architectural lighting project is aesthetics; this is why you’re installing lights in the first place, right? Modern LED fixtures such as the Pulsar Luxeos range offer a massive colour palette, and a plethora of different effects can be achieved. However, you don’t have to use everything at once. Exiting colour effects that look stunning on a piece of modern architecture may look gaudy on a heritage building façade. White light doesn’t have to be static; Pulsar’s Vibrant White Luxeos range can create any colour temperature from warm candlelight to tungsten to clear daylight, and anything in between. Dynamically changing colour temperature creates an effect that’s both subtle and interesting. Similarly, the custom RGBW light engines of the Vivid Colour range can create all manner of mixed colours, from bold saturated shades to more subtle pastel hues,
Colour Rendering – Crucial but often misunderstood
Colour Rendering - Explained Colour rendition is a crucial but often misunderstood aspect of any lighting installation. There are a few methods of measuring colour rendering, including TM-30, the Colour Quality Scale (CQS) and others, but this article will focus on the Colour Rendering Index (CRI) as this venerable system is still by far the most commonly used. What is colour rendering? Put simply, colour rendering is a measure of how accurate the colour of objects illuminated appears to be, when compared to a reference source. Things illuminated with a high CRI light source can be expected to look very similar to how they would in daylight, for example. What colour rendering doesn’t do is tell you anything about the colour of a light source; that’s instead determined by the colour temperature (CCT). It also doesn’t tell you the range of colours that can be seen under the light source- something known as the gamut area. How does CRI work? CRI is based on a set