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LEJ is your provider of high-performance Illumination as well as Power Electronic solutions in the fields of Microscopy, Analytics, Medical Technology, Semiconductor and Industry.
Besides its comprehensive portfolio of brand products LEJ offers the highest degree of flexibility and speed to bring customer-/application-specific products to the market. World-known OEMs count on LEJ as their system provider for e.g. laser and system power supplies, LED high performance controller as well as their partner for contract assembly of complex opto-mechanical and opto-electronical sub-assemblies and systems.
With LUXYR and AMPYR LEJ markets two proprietary-developed lines of standard products, utilized specifically in microscopy applications. Especially in demanding Fluorescence, but also in routine Transmitted and Reflected Light microscopy applications the Xenon, Mercury and (multi-channel) LED light sources are employed worldwide.
The entire range of brand products can be customized according to customers and applications. By providing a modular design as well as an intelligent roadmap-based development platform, LEJ allows such customization to be conducted in a very short time (time-to-market) and at reasonable costs.
LEJ supports OEM customers with in-depth know-how in dimensioning Lamp-, LED- and (increasingly) Laser-powered Illumination Systems. LEJ is in the unique position to advise customers independent from the light sources, thus being able to develop and manufacture hybrid / multi-modal Illumination Solutions. In the field of Power Electronics customers benefit from durable, productive, long term available solutions that, at the same time, deliver reproducible and quantifiable results.
Leistungselektronik JENA GmbH (LEJ) was founded as a spin-off creation of the research center of Carl Zeiss Jena GmbH in December 1991. The company is fully integrated with a strong focus on core technology competencies, all manufacturing facilities are DIN ISO 9001 certified to ensure an invariably high standard of quality and reliability of our products.

MANKUN electronics co., ltd. was founded in August 2005, is a collection of LED lighting PCB circuit board research and development, production, and sales in one of the highly Modern enterprises with new technology. Has a number of imported automatic production lines, a strict management system, and excellent technology research and development and management talent, and in February 2008 established Taiwan Mankun electronics co., LTD.
Professional PCB PCB is engaged in the production of the single and double aluminum substrate, copper substrate, FR4 fiberboard, multilayer PCB, and flflexible PCB. A complete set of imported advanced circuit board production equipment and electronic mounting equipment. The products are mainly used in LED lighting (LED commercial lighting, LED indoor and outdoor lighting, LED industrial lighting, LED vehicle lighting) electronics, machinery, communications, medical and other areas with high heat dissipation requirements; The company has passed UL certifification (certifificate number: E334090) excellent quality circuit board manufacturers.
Our company is the honoree of the " the quality first, keep improving" policy, with strong research and development capacity, and a number of patents to lay a solid foundation. Our products are widely exported to America, Russia, South Korea, other countries, and so on. Our company adheres to the Customer-oriented, with the best quality, best efficiency, and best service, to create the highest value for customers at home and abroad.