LM-85 Light Measurements for High Power LEDs
LM-85 is an Illuminating Engineering Society (IES) approved method for the Electrical and Photometric Measurements of High Power LEDs. The…
Light Measurements
Current Source Induced LED Photometric Measurement Variations Presentation at CORM
Jeff Hulett, Vektrex CTO, discussed Current Source Induced LED Photometric Measurement Variations at CORM...
Vektrex CTO Tackles Roadblock that Threatens Advancement of LED Industry
In Jeff Hulett’s latest article, published in Pennwell’s LEDs Magazine, he identifies the source of wide-spread measurement errors in the LED industry, details measurement methods that can help reduce these errors, and provides guidelines to ensure that LEDs are not undervalued.
Video: Three Steps to Improved LED Light Measurements: Repeatability
In this webinar, Jeff Hulett discusses factors that must be controlled for optimal repeatability and provides examples of what to look for and what to avoid in your measurement system.
Video: Three Steps to Improved LED Light Measurements: Accuracy
In this webinar, Jeff Hulett discusses the three LM-85 measurement methods and hones in on the method that provides the most accurate measurements: Continuous Pulse.
Optimizing Continuous Pulse LED Measurements for Maximum Accuracy
Jeff Hulett presents techniques to identify, quantify, and minimize errors when using continuous pulse method.
LM-85 Research – Light Measurement Error Sources
Typical LED measurement systems use source/measure instruments delivering DC or pulsed current. In many of these systems junction temperature is…