LED - Technical Notes

LED light bulb  produces light using light-emitting diodes (LEDs). LED lamps are significantly more energy-efficient than equivalent incandescent lamps and can be significantly more efficient than most fluorescent lamps.                          We can put LED bulbs in regular lighting fixtures.  This includes fixtures that have previously used incandescent bulbs or CFL bulbs. After all, LED light bulbs are intended to replace old light bulb designs that are less energy efficient. Be sure to choose an LED bulb with a base, shape, and wattage that is compatible with the fixture. As LED bulbs are being manufactured in every possible design, it should easy to find the right fit for your lamp or chandelier. There are 2 types of LED Bulbs Driver LED bulb In these types of Bulb, a separate driver circuit is used for power supply. LEDs are mounted on separate chipset. DOB ( Direct On Board...

LED tubes   are extremely popular energy efficient lamps used in Commercial, Industrial and public facilities   for a variety of good reasons. Firstly, compared with their expensive-to-run fluorescent counterparts, LED tubes provide solid medium to long-term term savings on both energy and maintenance costs. But there are different types of lamps (T5, T8 & T12) that you need to be aware of. The "T" in lamp nomenclature represents the shape of the lamp-tubular. The T in front is used to specify the shape of the bulb and lets you know that the LED light bulb is a Tube. Following the T, the numbering specifies the diameter of the lamp measured in fractions of an inch.    The number following the "T" usually represents the diameter of the lamp in eighths of an inch (1 inch equals 2.5 centimeters). T5 lamps have a diameter equal to 5 times an eighth of an inch, or 5/8". These lamps are approximately 40% smaller than T8 lamps, which are one inch in diameter, an...

All light sources degrade over time or most just “burn out”. LEDs, on the other hand, do not burn out but continue to degrade – eventually beyond useful light output, which is typically recognized as 70% of initial luminous flux (L70). Recognizing the need for an industry standard that would also help users evaluate LED products, in 2008 the Illuminating Engineering Society of North America (IES) published LM-80. Note, however that while LM-80 provides a standard method for testing lumen maintenance, it does not provide guidance or recommendations for predicting or extrapolating maintenance beyond the duration of these measurements. LM-80 is a standard that defines how the lumen output and colour shift of LEDs should be measured over time and at different temperatures. The full name of the latest version of this standard is “IES LM-80-20 Approved Method: Measuring Luminous Flux and Color Maintenance of LED Packages, Arrays and Modules”. LM80 Test LM-80 is important to lighting de...

The latest LED improvement has been “Chip On Board” or COB innovation.  A COB (Chip-on-Board) is an LED packaging technology that describes mounting multiple LED chips directly onto a substrate to form a single module.    Multiple LEDs, minuscule in size, are wired and packaged together into a single ceramic or copper board so that they function as a sole light source. ​ They are sometimes nicknamed “fried eggs” (when they are not lit) because of their yellow phosphor circle on a white board. COBs are made up of multiple chips, usually with a minimum of 9 on a board.  Due to the small size of the LED chips (imagine a quarter), Chip-on-Board technology allows for a much higher packing density than surface mount technology (SMD). COB chips only have 1 circuit and 2 contacts, regardless of the number of the diodes. When a COB LED package is energized, it appears more like a lighting panel than multiple individual lights as usually the case with other LED packages, li...

It is becoming increasingly important for companies to become eco-friendly. Customers increasingly want environmentally friendly options and using an environmentally friendly light source can help companies reduce their energy use, as well as attract a socially conscious consumer base. The energy sector contributes up to 40% of the global carbon footprint. This means that we need efficiency in the energy sector. Light Emitting Diodes, LED lights, is one of the most energy-efficient lighting technologies. LED bulbs save more than 80% of energy when compared to incandescent bulbs.  LED lights consume less energy LED lights need significantly less energy to be bright, unlike other traditional luminaries. In some cases, LED Lights can save more than 85% on energy consumption. Fewer watts per bulb saves energy which means less energy is needed. On a traditional bulb, you will get as much as 20 lumens per Watt. In a LED bulb, one Watt can light up as many as 100 lumens....

LED downlights are recessed systems those are designed and engineered for optimal operation of an LED module and also efficient regulation and precise distribution of its luminous flux. In conjunction with custom designed secondary optics, an array of discrete LEDs can be designed to provide uniform ambient illumination; a single-point LED can create a spot beam with the highest punch possible for accent lighting. The integrated design allows the LEDs to make full use of the luminaire housing for heat sinking, thereby keeping the LED junction temperature under control and maximizing the performance potential of LEDs. In systems with co-located drivers, miniaturized LEDs or compact LED arrays make space for an electrical compartment that can accommodate full-featured driver and control circuitry while isolating thermal stresses from the LED module. An integrated LED downlight generally consists of housing, an LED light module, a driver, and a trim. Housing The housing is the...