Cephos has been involved in the design and manufacture of LED lighting in the U.K. since 1999, consulting
with lighting designers and architects on their external and internal architectural LED lighting requirements.
Cephos Electronic Circuits Ltd can assist with the design,
manufacture and assembly of your LED Printed Circuit Board using standard FR4
PCB for the mounting of the lower output LEDs or the advanced Aluminium cored PCB’s which aid the dissipation of heat generated by high
power LED’s.
Cephos manufacturing services include
design, manufacture and assembly of aluminium, steel and stainless steel
enclosures for LED luminaires and fixtures. A one-stop shop for all mechanical
fixtures and fittings.
Cephos is a major electronic component supply
specialist, including the supply of all LED’s,
enabling the customer to take advantage of Cephos buying power to ensure low
prices and short lead times.
dictionary definition: The LED or Light Emitting Diode is an electronic semiconductor device that emits light when an electric current passes through it.
LEDs are more efficient than incandescent lamps, and are fast becoming more efficient than fluorescent lamps lending themselves increasingly as general sources of light.
colours: a full range of LED light colour is available
from Infra-red, Red through Amber and Yellow to Green and Blue and
Ultra-violet.
device power: from pcb surface mounted sub-miniature
units just a couple of millimetres square at around 100mW to large discrete
power LEDs at several Watts which require heatsinking.
Select items from our on-line
shop, LED floor
lighting, LED bollards, designer LED wall lights, LED lighting kits, LED
torches, LED accent lighting, LED plinth lighting, book reading lights and LED desk lights.
Latest LED News:
HARRISBURG, Pa. – June 12, 2008: A new in-line connector from Tyco Electronics
This surface mounted connector is designed to make connecting of aluminium-clad printed circuit boards for LED lighting applications that include lighting controls and LED light modules faster and easier.
DURHAM, N.C., March 3, 2008 : Cree Completes Acquisition of LED Lighting Fixtures, Inc.
This acquisition expands Cree’s market opportunity by providing direct access to the lighting market. Cree's business now encompasses LED chips, components and lighting solutions. It further enables Cree to drive retrofit solutions to convert existing lighting infrastructure to energy-efficient lighting and to accelerate the adoption of LED lighting.
Editorial reviews of recommended publications /
LED Lighting books featured in the LEDer Lighting on-line shop
Synopsis
A revolution in the way we use artificial lighting is underway, one that is
every bit as sweeping and significant as Edison's invention of the light bulb.
The technology of light emitting diodes is ready for widespread
implementation. Its impacts will include a reduction in energy consumption for
electric lighting by up to 80 per cent. This book tells the story of Shuli
Nakamura, a gifted Japanese engineer who came out of nowhere to stun the world
with his announcement that he had created the last piece in the puzzle needed
for manufacturing solid-state white lights. The invention of this holy grail
product which promises to make the ordinary light bulb obsolete, had eluded
the best minds at the top electronics firms for 25 years. Until his startling
announcement, Nakamura had not even been on the radar screen of most industry
observers. The author is the first Western journalist to interview Nakamura
and has received the brilliant engineer's full co-operation. He has also
interviewed other key players in the imminent lighting revolution proving an
exciting preview of the technological, entrepreneurial and artistic creativity
that will soon be unleashed by Nakamura's inventions.
Synopsis
Light-emitting diodes are being widely used due to their efficient use of power.
The applications for power LEDs include traffic lights, street lamps, automotive
lighting, architectural lights, household light replacements, signage lighting
(replacing neon strip lights and fluorescent tubes), and many more. Powering
(driving) these LED's is not always simple. Linear driving is inefficient and
generates far too much heat. With a switching supply, the main issues are EMI
and efficiency, and of course cost. The problem is to get a design that meets
legal requirements and is efficient, while costing the least. This book covers
the design trade-offs involved in LED driving applications, from low-power to UB-LEDs
and beyond. It provides a practical, "hands-on" approach to power
supply design for LED drivers. It includes detailed examples of what works and
why, throughout the design process. It provides commentary on how the calculated
component value compares with the actual value used, including a description of
why the choice was made.
Synopsis
This is a thorough reference that sheds light on the promising field of solid
state lighting. Solid state lighting is a rapidly emerging field. Light Emitting
Diodes are already used in traffic signals, signage/contour lighting, large area
displays, and automotive applications. But its greatest future lies in the
possibility of applying solid state lamps to general lighting. Solid state
lighting promises to reduce energy consumption as much as fifty percent, cut
down on carbon dioxide emission, and even spur the development of a completely
new lighting industry. Giving this important emerging field the attention it
deserves, "Introduction to Solid State Lighting" comprehensively
covers: the history of lighting; the characterization of visible light;
conventional light sources; LED basics; extraction of light from high brightness
LEDs; and white LED applications of solid state lamps.
Synopsis
Revised and fully up-dated, the second edition of this graduate textbook offers
a comprehensive explanation of the technology and physics of LEDs such as
infrared, visible-spectrum, ultraviolet, and white LEDs made from III-V
semiconductors. Elementary properties such as electrical and optical
characteristics are reviewed, followed by the analysis of advanced device
structures. With nine additional chapters, the treatment of LEDs has been vastly
expanded, including new material on device packaging, reflectors, UV LEDs, III-V
nitride materials, solid-state sources for illumination applications, and
junction temperature. Radiative and non-radiative recombination dynamics,
methods for improving light extraction, high-efficiency and high-power device
designs, white-light emitters with wavelength-converting phosphor materials,
optical reflectors, and spontaneous recombination in resonant-cavity structures
are discussed in detail. With exercises, solutions, and illustrative examples,
this textbook will be of interest to scientists and engineers working on LEDs
and graduate students in electrical engineering, applied physics, and materials
science.
