Technology

Technology Enabling Luminous Surfaces for Architecture

LEDs as a light source have delivered on the promise of energy efficiency and long life. Cooledge develops technologies that enable the next step in the evolution of lighting to fully integrated, digitally controlled surfaces that are part of architecture, not added to it.

 

Immersive Illumination

Immersive illumination is a subjective feeling of being surrounded by light in a way that feels comfortable and natural, like being outside. Immersive illumination is surprising: it delivers high levels of illumination but “feels like less” because we are used to experiencing localized higher levels of illumination created by traditional points and lines of light as inherently bright and in many cases somewhat uncomfortable.


A Surprising Amount of Illumination


Much as a diffuse sky delivers high levels of light by virtue of scale, the immersive illumination that is experienced under a luminous ceiling similarly does not require a large number of lumens per area, unlike troffers and linear pendants that supply much of the general illumination in public spaces today.

 

Typical Stretch Ceiling Configurations

Continuous | Luminous Ceiling

Segmented | Luminous Ceiling

2 x 4 Luminous Surfaces (Troffer Equivalent)

Average Maintained Illuminance vs Cooledge TILE Lumens

Cooledge TILE Lumens

Continuous

Segmented

"2x4" Equivalent

fc

lux

fc

lux

fc

lux

150

50

550

10

110

5

55

300

100

1100

20

220

10

110

600

200

2200

40

440

20

220

Continuous luminous ceilings deliver substantial levels of illumination without the highly localized concentration of lumens found in traditional luminaires.

Download Details


Cooledge TILE products provide uniform light no matter the • scale and where obstacles or angles require modification

Constant Voltage Architecture



Cooledge‘s constant voltage electrical architecture is designed for enabling large luminous surfaces of variable sizes, shapes, and site conditions using simple, standard products.

Cooledge Approach



The Cooledge approach ensures that illumination is always uniform and consistent, independent of the size of the electrical load connected to the LED driver or the field modifications required to adapt to site conditions.

 

  • Uniform light output for all configurations
  • Adaptable for field modification
  • Scalable power architecture

What About Constant Current?


Constant current approaches are optimized for points and lines of light such as downlights, linear pendants, and troffers where the amount of light – and hence electrical load – is constant and the size and shape of the luminaire never changes.



When constant current is used for large surfaces visible differences in intensity may result – especially where obstacles or angles require field modification.



Constant current architecture is used for fixed luminaire types

 


Constant Current for Large Luminous Surfaces


When used for large luminous surfaces, constant current systems cannot match the uniformity of constant voltage designs and present significant challenges when required to adapt to site conditions.


  • Uniformity across a surface area can only be achieved by pre- setting each constant current LED driver to match the load
  • Field modifications can result in visible intensity differences and/or require complex calculations to reset LED drivers
  • Power architecture is scalable only within a very limited range

Constant current systems are optimized for efficiency where flexibility and scale are not a requirement.


  • Uniform light output in a single configuration
  • Not intended for field modifications
  • Fixed power architecture

Luminous Surfaces: Integrating Light & Materials



Creating luminous surfaces for illumination requires a unique understanding of the interaction between light and architectural materials.

Cooledge uses its knowledge and expertise in photometric analysis to integrate and optimize SURFACES that deliver digitally controlled immersive illumination for creating more open tailored environments

Tunable White Does More


Many products offer tunable white capability. Some offer dimming and some offer constant lumens. Cooledge delivers both.

Others

Some products simply add the light output from a warm and a cool LED together resulting in more light output at CCTs in between the two endpoints

Others

Some products are able to provide constant light output at all CCTs in their tunable range but at the cost of being able to dim.

Cooledge TILE

Cooledge delivers constant light output across all CCTs in the tunable range AND dimming to 0.05% at any CCT in the range.

Flicker-Free Dimming

A key aspect in the understanding of the interaction between light and human physiology is the effect of flicker generated by electric sources of light. In the past, before the adoption of high frequency ballasts, you may have heard people complain about fluorescent lights, however, it is with the widespread adoption of LED sources that flicker has become an important design consideration.

  • Visible flicker occurs at relatively low frequencies (≤100 Hz), however, people may experience discomfort at frequencies that are considerably higher. Recent studies have indicated that the area of discomfort for some people may occur at even higher operating frequencies than previously thought – especially for LED sources using PWM dimming which has a very high modulation percentage.
  • Cooledge products incorporate dimming at a frequency (3000Hz) that is well within the recommended “safe zone” as currently defined.
 

True Temp Optics (TILE Exterior)



The Cooledge TILE Exterior lighting system features True-Temp Optics that ensure minimal color shift from the base LED. This is in contrast to products that use encapsulation to achieve a suitable ingress protection rating for exterior use.



A clear lens over a void optical cavity ensures minimal color shift



The encapsulation material causes a color shift that may vary due to inconsistencies in the coating thickness