LEDs ♦ news digest
Designed with graphic arts printing in mind, the UV Slim devices also provide all of the traditional advantages of Luminus’ Big Chip LED technology, including improved thermal power density and simpler support system architecture, along with delivering greater wall-plug efficiency than traditionally-sized LED dies.
These new UV Slim LEDs, with a product designation of CBT-120-UV-C14, are Big Chip LEDs that feature a single monolithic 12mm2 die that emits directly into air. They are available in a NIST- traceable power range output of 11W to 13.3W.
Luminus’ UV Slim LEDs are available across the globe through Avnet, Digi-Key, EBV Elektronik, Marubun, and Mouser distribution partners.
LED Waves extends LED lamp lifetime with new heat sink
The company’s in-house engineers reveal the process behind longer-lasting LED replacement lamps
LED Waves, a supplier and manufacturer of LED lights in the USA has unveiled a line of replacement lamps.
Launched only last year, it is easily distinguished by the highly intricate heat sinks that surround and protect each light source.
Andromeda replaces the high pressure sodium and metal halide lamps typically used in facilities with high ceilings.
In following LED Waves’ philosophy of thermal distribution, the firm’s LED high bay features a unique heat sink that maximises surface area. This component, which makes up the body of the lamp, underwent the most development since the beta release of the product.
Now, after months of research and tweaking, the final heat sink design is primed for extrusion. The company’s LED OEM team is proud to announce that as of December 2012, the Andromeda LED high bay has the only extruded heat sink of its kind on the market.
Typical LED high bay manufacturers use a die casting process to create heat sinks. This limits the potential surface area of the heat sink to that of the mould on which it is formed. These moulds must be lined with thick walls to withstand the high temperatures of the metals poured therein.
As a result, the heat sinks produced from die casting feature fewer open spaces. However, this is still the most commonly used process in the LED lamp manufacturing industry as it is inexpensive.
Extrusion refers to the process of pushing or pulling a material through a die to achieve a desired cross section. As the material undergoes no outside pressure as it is extruded, very fine details may be rendered through the cavities in the die. This process is therefore capable of creating more distinct surfaces within a cross section.
This increased potential is LED Waves’ reason for extruding the heat sink on their LED high bay, even though the process is more costly. Maximising surface area within a form in turn maximises channels through which hot air can flow away.
A close up of the extruded LED high bay heat sink body
This month the company announced an update to their LED high bay light, originally introduced in May 2012. Designed for clients in the commercial, industrial, and transportation sectors, the
As heat is the leading contributor to premature failure in electronics, effective dissipation significantly lengthens the lifespan of an LED light. This supports the extended 5 warranty LED Waves places on the Andromeda LED High Bay.
This guiding principle of maximising surface area to increase heat dissipation is evident in the other exclusive LED replacement lamps made in the USA
January/February 2013
www.compoundsemiconductor.net 109
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