left shadow main shadow main shadow
main shadow
Ld logo
Professional Ligting top_banner
Home top navigation Jobs/Events/News top navigation Catalogs top navigation Manufacturers top navigation Lighting Products top navigation Newsletter Sign-Up top navigation Apps_Blogs top navigation Lighting Feeds
Subpage Top Grad
Indoor Lighting
Left Navigation
Outdoor Lighting
Left Navigation
LED Lighting
Left Navigation
Ballast/Transformers
Left Navigation
Controls
Left Navigation
Lamps/LED
Left Navigation
Emergency/Exit
Left Navigation
Site Sponsors
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Sponsors Images
Industry News
DOE Publishes Report On Dimming, Flicker, And Power Quality Characteristics Of LED PAR38 Lamps
April 20, 2014

The U.S. Department of Energy's CALiPER program has released Report 20.2, which is part of a series of investigations on LED PAR38 lamps. Report 20.2 focuses on dimming, flicker, and power quality characteristics evaluated with a single dimmer.

The dimming, flicker, and power quality behavior of the LED PAR38 lamps evaluated in this study was less consistent than that of conventional halogen PAR38s. Among the trends that emerged from the performance of the 33 LED lamps that were listed as dimmable:

•Most LED products produced more relative light output at a given dimmer level than the benchmark halogen PAR38s.

•When operated by a switch, almost all of the LED PAR38s exhibited less flicker than a magnetically ballasted fluorescent lamp, and more than two-thirds exhibited flicker less than or comparable to that of a halogen lamp. However, when dimmed, about half of the lamps exhibited more flicker than a magnetically ballasted fluorescent lamp, and almost all of the LED products exhibited more flicker than a typical halogen lamp.

•While all of the LED lamps tested met the current ANSI-defined thresholds for power factor when operated by the switch, nearly one-third had a power factor less than 0.5 at some point over the dimming range, which would not meet the standard.

For a closer look at the findings, download the full report.

Trans
Banners
Trans
Main Shadow Right
Indoor Lighting  |   Outdoor Lighting  |   LED Lighting  |   Ballast/Transformers  |   Controls  |   Lamps/LED  |   Emergency/Exit  |   Manufacturers  |   Lighting Products  |   Events  |   Jobs  |   Industry News  |   New Catalogs  |   Site Map  |   Advertising Information
LIGHTDIRECTORY - LightDirectory.com, P.O. Box 795, Oswego, IL 60543.
Trans