LEDs Magazine May/June 2010 issue

June 7, 2010
The May/June 2010 issue of LEDs Magazine is now available.
+++ Cover +++

The Primopiano projector from iGuzzini, designed by Renzo Piano, exemplifies the sophisticated approach to LED lighting seen at the Light+Building tradeshow.

+++ Features +++

NewsLED retrofit lamp selection grows at LFIAt Lightfair International this year, LED retrofit lamps were all the rage. Companies already offering LED retrofit lamps were joined by several large companies, including Sharp and Toshiba.
SHOW REPORT: LIGHT+BUILDINGLight+Building showcases sophisticated LEDsWith more than 180,000 visitors, no-one can deny the status of Light+Building, held this year in mid-April in Frankfurt, Germany, as one of the world’s pre-eminent tradeshows for the lighting industry. TIM WHITAKER reports.
RELIABILITYNavigating uncharted waters: new challenges in specifying LED luminaire lifetimeUnderstanding and quantifying the behavior of a single LED, and calculating how this will affect a system with multiple LEDs, are crucial if lighting companies are to set their system warranty level correctly and assess the cost of failures potentially occurring within the warranty period, writes FRANCOIS MIRAND.

Outdoor Lighting
New outdoor projects and studies dominate this month’s Focus On feature.

LIGHTING: PLANAR SOURCESEfficient LED planar lighting begins at the light sourceLED planar lighting is a new product category that uses LED technology to create large, flat surfaces of uniform light in a highly efficient way, writes ITAI COHEN.
REPLACEMENT LAMPSLED-based T8 replacement tubes struggle as fluorescent replacementsEarly LED replacements for 4-ft, linear fluorescent T8 tubes don’t deliver sufficient light output to make them cost-effective SSL retrofits, but the products will get better along with LED improvements says MAURY WRIGHT.

A three-stage power supply efficiently drives multiple LED strings
A PFC stage, an inverted constant-current buck regulator, and a downstream DC/DC transformer circuit can drive LEDs with better than 90% efficiency says JAMES ALIBERTI.

LED MANUFACTURINGBringing down the cost of high volume LED productionCollaborative efforts and government-funded research projects are targeting significant improvements in LED manufacturing costs, writes PAULA DOE.
LAST WORDRecessed LED accent lighting offers powerful potential for interior spacesAdvances in the design of LED-based accent lighting fixtures could open up a largely untapped market, explains AL NEAR, senior VP of sales and marketing with USAI.

+++ Columns/departments +++

Vegas’ brightest lights shined at Lightfair


  • LFI presents Innovation Awards
  • Philips and Future extend LED partnership
  • Cree luminaire breaks 100 lm/W, extends warranty
  • LED retrofit lamp selection grows at LFI


  • EPA releases draft Energy Star requirements for Luminaires
  • DOE updates L Prize progress