LED Products In-Depth Look

Casambi light control and Seoul Semiconductor SunLike LEDs for true human-centric lighting

SunLike Human Centric lighting via Casambi app

Casambi, a pioneer in Bluetooth Low Energy (BLE) wireless lighting control, has teamed up with LED technology specialist Seoul Semiconductor to offer lighting designers precise control of LED strips, modules and luminaires that use the new SunLike technology that matches the spectrum of sunlight. For the first time, this development puts true human-centered lighting in the hands of designers.

Users can use Casambi's Bluetooth-based wireless control system and app with products that include SunLike series LEDs to precisely adjust the light level, knowing that the spectrum reflects real sunlight, a key ingredient for Human-centric lighting

Human-centric lighting describes lighting designed to work with the natural rhythms of the human body. It is based on the well-known fact that the human eye recognizes the presence of a certain wavelength of blue light in the spectrum of sunlight and derives the time of day from this. In this way, light helps to regulate our sleep-wake cycles and other physical rhythms and has a significant impact on our mood and well-being.

Human-centered lighting takes advantage of this effect by adjusting its brightness and color temperature during the day to mimic natural light.

With Casambi you can now set the color temperature at specific hours of the dayCasambi allows control of the lights through a timer or a variety of presence/movement sensors and daylight sensors. It can control lights that change colour temperature over a very wide range, and designers have the freedom to configure dimming and create scenes or animations for the application.

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Mid Power LEDs it test: Nichia 757G is the leader

As a manufacturer, we want to use the most powerful LEDs in our LED strips and modules. We focus especially on mid-power LEDs that typically consume less than 0.3 watts of power, are fairly small, and require minimal or no cooling. A large part of our products use these LEDs.

Before selecting the most powerful LED for our products, we compared more than a dozen models from leading LED manufacturers: Nichia, Osram Opto Semiconductors, Samsung, Philips Lumileds, LG Innotek, Seoul Semiconductor, Cree, Everlight.

For a meaningful comparison, we have selected LEDs that operate at 65 mA with a voltage between 2.75 and 3.2 V, divided into three groups:

Cold white (5000-6500K), CRI 80+, for linear fluorescent lamp replacement (LED tubes) or luminaires for office or industry.
Warm white (2700K-3900K), CRI 80+, is normally used in LED lamps, linear luminaires, cove lamps, desk lamps, normally for residential and catering applications.
Warm white (2700K-3900K), CRI 90+, with applications in luxury lighting, professional linear luminaires, cove luminaires for the commercial and gastronomic sector.
For each category, we compare luminous flux and luminous efficacy at the usual "laboratory temperature" barrier of 25ºC and more realistic 100ºC. The comparative data are those from the manufacturer's data sheet.

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LED modules with tunable white technology for Human Centric Lighting.

Our LED modules with tunable white technology are a strong foundation for Human Centric Lighting. You can dynamically manage their color temperature and brightness in order to simulate natural daylight across the period of a day, from a productive pure white in the morning to a cozy warm white in the evening. Human Centric Lighting has has proven to increase well-being, concentration and performance.

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Chip Scale Packaged (Flip Chip) LEDs

Usually, a light emitting diode (LED) has two key components, the LED chip that emits the light and the LED package which focuses it, enables assembly into lighting products and transfers the heat away to the heat sink.

Large LED manufactures design and build both LED chips and packaged LEDs. Small manufactures usually purchase LED chips and assemble them into packaged LEDs. This explains the enormous, sometimes confusing, variation in packed LEDs specification, performance and quality. Packaged LED attributes are defined by both chip and package design and production.

This picture has now got even more complicated with the increasing market penetration of Chip Scale Packaged LEDs, known as CSP or flip-chip LEDs.

If we consider a packaged LED to be the automobile with the LED chip its engine then a CSP LED is an engine on wheels, with minimum body work or other components.

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New LED design for increased performance and optimised lighting fixture cost

New Led Deign, the Flip Chip

When making a decision to purchase LED lighting technology we are usually put in the balance price and cost of ownership, the reason behind this being that LED technology is general more expensive. 

However, the current market penetration rate of LED shows the argument that lower cost of ownership due to energy savings and long product lifetime is more than worth price difference is convincing.

This approach can have serious problems when the promised long term savings do not materialize. A LED can fail or degrade sooner that expected due to many reasons, from false advertising (the LED design could never perform as advertised), poor handling of heat management to mistakes in the product design. A customer faced with this issue could loose trust in the LED technology.

The solution is to reduce the price of LED products without a compromise of performance and quality. Innovation is the way to do it as is the case of Nichia's new LED design with Direct Mountable Chip technology.

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Nichia Maxline LED Modules for high performance linear lighting

Our Nichia Maxline LED modules are the key to build linear lamps or fixtures with superior performance. Integrated into a T8 LED tube, the Nichia Maxline modules can easily surpass the performance targets for effective and economical sound replacement of fluorescent LED tubes. This outstanding results arise from the use of Nichia 757 Mid-Power LEDs with the highest performance on the market.

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