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
LED Colour Mixing Explained
LED Colour Mixing Explained LEDs have had a long association with colour, from the advent of visible spectrum red LEDs in the early 1960’s to the ground breaking development of the blue LED by Shuji Nakamura. As soon as blue LEDs became commercially available, lighting manufacturers like Pulsar started to experiment with colour mixing, creating a vast palette of colours from a few carefully chosen light sources. Fast forward to the present day, and LED colour mixing has become the standard for architectural and stage lighting. So why are LEDs so effective at colour mixing? Most light sources produce a broad spectrum of light which has to be filtered out to make specific colours, whereas LEDs are very efficient at making precise specific colours directly from the source. Adding these colours together rather than having to remove large portions of the light spectrum is far more energy efficient, controllable and convenient. Simply by changing the levels of each LED, a massive