LED junction temperature2016-10-28
LED junction temperature, what is the LED junction temperature, what causes the LED junction temperature, and what are the ways to reduce the LED junction temperature? The following will analyze in detail 1. What is the junction temperature of the High power LED? The basic structure of High power LED is a semiconductor P-N junction. The experiment pointed out that when current flows through the LED element, the temperature of the P-N junction ...
150 lumen per watt Led Tube lights2016-06-22
150 lumen per watt Led Tube lights – Not that there is anything wrong with the old sodium-discharge lamps. Producing practically all their light at a wavelength near the peak sensitivity of the human eye gave them a theoretical luminous efficacy of 200 lumens per watt of electricity consumed, though their real-world performance is around two-thirds that. The new white LEDs used in his street are rated at around 100 lumens per watt. Compact flu...
What is the IP rating system?2016-04-06
The IP Rating describes the enclosure for electronic equipment according to the definition of the European Committee for Electro Technical Standardization. IP is standing for Ingress Protection, the protection of the product against environmental effects like solid objects or liquids. The IP rating consists of two digits which are describing the height of the protection against these effects. The larger the number, the higher the protect...
Heat Pipe Technology2016-02-24
Figure 1: Cross-sectional view of a heat pipe embedded radial heat sink.
In light-emitting diodes LEDs), 70 percent to 80 percent of the applied electrical power is converted to waste heat. If this thermal energy is not properly dissipated, the resulting high operating temperatures lead to reduced brightness, shift in wavelength color), and reduced life. Optical requirements impose the heat to be extracted through circuit boards designed to b...
What is COB LED2015-11-18
Cob integrated light source is chip on board, bare chips are glued to the Interconnect substrate with conductive or non-conductive adhesive, and are welded with the golden wires together, which realizes an electrical connection.
The features of COB integrated light source as following:
1. Through free collocation and combination, they can be a variety of LED lamps with easy assembly
2. High reliability, no dead lamp, no plaqu...
The importance LED thermal design2015-10-25
LED is a semiconductor device itself, all of the semiconductor device has a normal operating temperature requirements, including ambient temperature and operating temperature. Ambient temperature semiconductor devices generally have less than 80 degrees of normal, while the internal LED PN junction temperature reaches 140 degrees and they will fail. Normal working temperature of its own that comes out through the pin or special base, which can...
Understanding Color Temperature2015-07-13
Lamps are often rated by:
Power consumption and light output – in Watts Unit of electricity consumption), Lumens, Lux or Candela Units of light output), Lumens per Watt A derived unit that indicates the luminous efficiency of the lamp).
Color Rendering Index – A measure of how efficient is a lamp at reproducing colors.
Color Temperature – an indicator of visual light color
Of late, a new parameter called ‘Pupil Lumens’ ...
Color Rendering Index (CRI)2015-07-13Color Rendering Index or CRI, light temperature, Stoke’s shift, are terms that are often used by manufacturers to promote their lighting products. There are CRI and Color Temperature wars waging in the cyberspace to defend incandescent bulbs against the onslaught of legislation and energy efficient LED Lights.
• Have you ever wondered what all that jargon behind light quality means?
• Is a Color Rendering Index CRI) of 80 good enough or should...
The distinction between high-and low-power LED's2014-04-07
With the continuous development of LED technology, people adapt to the development of large-area lighting and power growing single LED chip, currently the worlds most cutting-edge single LED can already do more than 200W power, although power can do it , but its cost and poor. Below we have several common LED, for example, to do an analysis.
Currently the industry is heavily used single 0.06W power, its maximum brightness can be done 7LM...
LED recycling-a new hot topic2013-05-15
LED has been very environmentally friendly in its production life span, but if it can be recycled and re-used, it would be more environmentally friendly. More than 95%LED can be recycled, and recycling companies will buy the old LED with low price.
When LED does not contain any harmful substances, it was classified as RoHS-compliant. RoHS was passed in January 2006 in the UK.It is restrictions on electrical and electronic equipment to th...
