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About Us

Electronic Lighting Systems, Inc. (ELS) is one of few vertically integrated LED suppliers in the world. ELS's LED and products are the next generation in solid state lighting materials. Our LED emitters and products combine highly efficient materials that allow our products an efficacy well above other leading brands in the marketplace. ELS's LED products are thoroughly tested for conformity and electrical specifications. Our high brightness LEDs are useful in a wide range of lighting applications such as general illumination, aeronautical lighting applications, and LCD backlighting.

LEDs - How do they work?

When a light-emitting diode is forward biased (switched on), electrons are able to recombine with holes within the device, releasing energy in the form of photons. This effect is called electroluminescence and the color of the light (corresponding to the energy of the photon) is determined by the energy gap of the semiconductor. An LED is often small in area (less than 1 mm2), and integrated optical components may be used to shape its radiation pattern. LEDs present many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved robustness, smaller size, faster switching, and greater durability and reliability.

Physics of LEDs

Like a normal diode, the LED consists of a chip of semiconducting material doped with impurities to create a p-n (positive and negative) junction. As in other diodes, current flows easily from the p-side, or anode, to the n-side, or cathode, but not in the reverse direction. Charge-carriers—electrons and holes—flow into the junction from electrodes with different voltages. When an electron meets a hole, it falls into a lower energy level, and releases energy in the form of a photon.

The wavelength of the light emitted, and thus its color, depends on the band gap energy of the materials forming the p-n junction. In silicon or germanium diodes, the electrons and holes recombine by a non-radiative transition which produces no optical emission, because these are indirect band gap materials. The materials used for the LED have a direct band gap with energies corresponding to near-infrared, visible or near-ultraviolet light.

ELS Lumen Maintenance Performance

Lumen maintenance for ELS solid-state lighting LEDs are typically defined in terms of the percentage of initial light output remaining after a specified period of time. We project that our LEDs will deliver, on average, 70% lumen maintenance at 50,000 hours of operation at a forward current of up to 700 mA. This projection is based on constant operation with a junction temperature maintained at or below 135°C. This performance is based on independent test data and internal reliability testing.

ELS Environmental Compliance

ELS LEDs are committed to providing environmentally friendly products to the solid-state lighting industry. Our LEDs are compliant to the European Union directives on the restriction of hazardous substances in electronic equipment, namely the RoHS directive. ELS does not intentionally add the following restricted materials to our line of LED products: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB) or polybrominated diphenyl ethers (PBDE).