the science behind fabric lightbox illumination

Wednesday April 8, 2020 15:23

LED explained - a light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The colour of the light (corresponding to the energy of the photons) is determined by the energy required for electrons to cross the band gap of the semiconductor. White light is obtained by using multiple semiconductors or a layer of light-emitting phosphor on the semiconductor device
LED lighting has two important advantages. It’s energy efficient and has a long lifespan. LED lighting comes in various different colours. The colour of the generated light depends on the materials from which the LED is made.

Illumination explained - lighting or illumination is the deliberate use of light to achieve practical or aesthetic effects. Lighting includes the use of both artificial light sources like lamps and light fixtures, as well as natural illumination by capturing daylight. Proper lighting can enhance task performance, improve the appearance of an area, or have positive psychological effects on occupants. Indoor lighting is usually accomplished using light fixtures, and is a key part of interior design and more commonly signage and messaging.

We have tried and tested a range of LED lights for use within our lightboxes, but no mainstream off the shelf solutions provided satisfactory results. As such we partnered up with a lighting manufacturer to develop and produce the modules we use in our OneFrame system today. As far as lighting types go, we use two lights options for the best possible solution in market today, namely,  edge-lit and back-lit. Deciding between these light sources generally comes down to size. Smaller light boxes are suited to edge lit, but once you go to oversize lightboxes the backlit option comes into its own.

Colour temperature explained - the colour temperature of a light source is the temperature of an ideal black-body radiator that radiates light of a colour comparable to that of the light source. Colour temperature is a characteristic of visible light that has important applications in lighting, photography, videography, publishing, manufacturing, astrophysics, horticulture, and other fields. In practice, colour temperature is meaningful only for light sources that do in fact correspond somewhat closely to the radiation of some black body, i.e., light in a range going from red to orange to yellow to white to blueish white; it does not make sense to speak of the colour temperature of, e.g., a green or a purple light. Colour temperature is conventionally expressed in kelvins, using the symbol K, a unit of measure for absolute temperature.

Colour temperatures over 5000 K are called "cool colours" (bluish), while lower colour temperatures (2700–3000 K) are called "warm colours" (yellowish). "Warm" in this context is an analogy to radiated heat flux of traditional incandescent lighting rather than temperature. The spectral peak of warm-coloured light is closer to infrared, and most natural warm-coloured light sources emit significant infrared radiation. The fact that "warm" lighting in this sense actually has a "cooler" colour temperature often leads to confusion. Read more here:

In simple terms, colour temperature is a measurement of the“whiteness” of a light source. We typically see light bulbs in the hardware store which are warm light or yellow, neutral in colour tone and cool light, blue in tone. In our lightboxes it is essential to have LED lights that are‘Daylight’ or 6000 Kelvin, this is considered as natural light ensuring that the printed graphics, logo and colours will best match your other printed marketing materials.

So no matter the complexity or size, if you would like to talk more about your idea and how OneFrame lighting will ensure best reults, please feel free to contact our team who would be happy to talk through the practical aspects and commerical considerations.

the science behind fabric lightbox illumination