Reliability and lifetime of LEDs

  With the increasing complexity of technical equipment, modules and individual components, reliability, lifetime and the cost of exchanging and revision become increasingly important for the customer. The single requirement that devices should not fail is no longer sufficient for modern, powerful components or devices. More often, it is an additional requirement that they should […]

Emergency lighting control by means of DALI

  With the global emergence of building automation, the powerful supervisory facilities and control of a DALI-based emergency lighting system in building designs and renovations are now too obvious to ignore. The Occupational Health and Safety (OHS) Act of 1993 states that emergency lighting must be provided in any workplace without natural lighting, that it […]

Partial flux – measurement reliability of lensed LEDs

  Most LED manufacturers use units of luminous intensity (cd) for the measurement and classification of LED brightness. This procedure is reliable and reproducible for numerous LED types, but is insufficient for LEDs with narrow emission angle characteristics. This article describes the procedures for measuring luminous intensity, partial flux and luminous flux, along with the […]

LED: what the end-user should know

  It is expected that LED lighting will account for more than half the global lighting market by 2017, making it essential for the end-user to better understand this technology. Although the cost of LED products is currently higher than regular lighting systems, the demand for LED technology is growing exponentially, which will inevitably result […]

Farewell to the incandescent lamp

  This article discusses the place of the incandescent lamp in the lighting industry over the years and explains in some detail three alternatives to this technology offered by the lighting industry. A lot has been written about the invention of the incandescent lamp. The first attempts at creating light using incandescent technology were made […]

The challenges of dimming LED loads with magnetic transformers

  The technical difficulties with dimming low-voltage LED lamps on magnetic transformers and some design tips to improve the situation and avoid problems. Anyone who has used LED loads with low-voltage magnetic or electronic transformers in dimming applications has likely experienced confusion, frustration or disappointment. Some blame the dimmer as the cause of the problem, […]

Thermal measurement guidelines for LEDs

  Guidelines for the thermocouple attach to measure the solder point temperature and the calculation of the approximate LED junction temperature for various LEDs. One of the most critical design parameters in an LED illumination system is its ability to draw heat away from the LED package. High operating temperatures at the LED junction affect […]