LED Lighting:

LED Lighting is considered as a ‘low hanging fruit’ in the fight against global warming and environmental pollution by the traditional fluorescent lamps.

Recent statistics from US Department of Energy put lighting consumption at 15% of the world’s total energy while contributing to 5% of the world’s total greenhouse gas emissions. By 2030, it is estimated that lighting demand will increase by 50%. The lighting industry is therefore moving fast to replace the traditional lamps with energy efficient white light-emitting diodes (wLEDs) which have potential to reduce lighting power consumption by half. However, the global growth of wLEDs will soon hit a snag due to over-reliance on rare-earth phosphors as raw materials which are facing export restrictions and their extraction also pose environmental issues. LehMoSense aims to satisfy the demand for rare-earth free and environmentally 'green' phosphors for LED lighting industry. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LED Phosphors:

 

Phosphors play a key role in LED lighting because they present the most economical way of producing white light from LED chips. Phosphors are luminescent materials that convert LED’s Ultra-violet (UV) or blue light into white light. The most common commercial white LEDs are produced by using blue LED chips coated with a phosphor that emits yellow light when blue light shines on it. The combination of excess blue light from the LED chip and the yellow light from the phosphor produces white light. Phosphors are further used to fine tune the type of white light produced by LEDs, i.e., cold white with more blue content or warm light with more yellow in it. Most of the commercial LED phosphors in the market today contain critical rare-earth materials. LEDs are finding applications in residential and commercial lighting, automobile, back display in Television (TV) sets, computers, smartphones and advertisement boards. LehMoSense offers a shift to a much-needed low cost and easily available alternative phosphors to fulfil the needs in these markets.

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Projected LED lighting penetration in the current residential lighting sector. Source: Clay Elliot, Lighting market trends 2020, US department of energy