Hong Kong International Lighting Fair (Autumn Edition)will be on Oct. 27 ~ 30, 2010in Hong Kong, China.

2010 LED+Light Tech Show will be on Oct. 27 ~ 30, 2010in HongKong, China.

LED is revolutionizing humans lighting environments.  There have been timelines established to replace incandescent or fluorescent lamps worldwide.  However, the current white light LED is based on GaN semiconductor that is epitaxially deposited on either sapphire or SiC wafers.  Due to the non-equilibrium growth of GaN lattice on mismatched Al2O3 substrate, or defects ridden SiC, there are ample dislocations (e.g. 109/cm2) that may reduce the internal quantum efficiency of photon emission.  Worse still, the dislocations may propagate irreversibly upon heating.  This is why LED will dim with time.  In order to avoid LED chips from overheating, the heat blocking epoxy insulator on the circuit board is replaced by diamond like carbon (DLC).  The result is a dramatic decrease of the chip temperature.  

The electronicIndia 2008 will be on September 02-05, 2008 in India.

Alone with the extensive application of LED in every trade, high power LED is widely adopted as light sources in traffic, railway and electronic equipment signal lamps. As defined by its name, high power LED is provided with higher power and heat, with larger lumen than ordinary LED, thus enable it to shine brighter. Strict requirements are posed on the selection of high power LEDs used in signal lamps. Ordinary LED can not be used as signal lamps at random for the following reasons:

The Old North Church, a beacon for Paul Revere's famous warning of the movement of British forces, and a symbol of the American Revolution, has gone high-tech with the installation of light-emitting diodes, or LEDs. The energy-efficient lights illuminate ceiling vaults inside the church, whose steeple was used to display two lanterns as a signal about British troop movements on April 18, 1775 — the night described in Henry Wadsworth Longfellow's famous poem, which included the line: "One if by land, and two if by sea."