LEDs Magazine Publishes Article by CEO Ian Lewin, Ph.D., FIES, LC

“Absolute Photometry has Relative Benefits for LED and SSL Performance Evaluation” LEDs Magazine, July/August 2008

Photometric testing methods are changing in response to the increased adoption of solid-state lighting

The lighting industry is buzzing with excitement: Solid State Lighting (SSL) is being celebrated as the solution to thousands of today’s energy and lighting application challenges. Available lumens per watt (otherwise known as the efficacy) of commercial, white LEDs now far exceeds that of incandescent sources. In the laboratory, LED’s have been developed with efficacies similar to fluorescent and certain High Intensity Discharge (HID) sources.

However, we do not yet know to what extent such devices will become viable in the future as a replacement for existing high efficiency sources; issues such as manufacturability, cost, and temperature stability must be addressed. Until these issues are sufficiently answered within the lighting industry, replacement costs and procedures will remain a reasonable concern to commercial purchasers.

Read the full article from LEDs Magazine, July/August 2008 (registration required):