DOE Publishes CALiPER Report on LED PAR38 Lamps Dimming, Flicker, and Power Quality

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

Disclaimers of Warranties
1. The website does not warrant the following:
1.1 The services from the website meets your requirement;
1.2 The accuracy, completeness, or timeliness of the service;
1.3 The accuracy, reliability of conclusions drawn from using the service;
1.4 The accuracy, completeness, or timeliness, or security of any information that you download from the website
2. The services provided by the website is intended for your reference only. The website shall be not be responsible for investment decisions, damages, or other losses resulting from use of the website or the information contained therein<
Proprietary Rights
You may not reproduce, modify, create derivative works from, display, perform, publish, distribute, disseminate, broadcast or circulate to any third party, any materials contained on the services without the express prior written consent of the website or its legal owner.

Nichia’s Tunable 757 receives rave reviews from industry leaders, including the coveted LpS Best Sustainability Technology Award. Nichia, the leader in and inventor of the high-brightness LED, announced its game-changing single LES, tuna... READ MORE

Innovative tunable white, mid-power LED enables luminaire manufacturers to improve colour tuning, shrink optics and fixture profiles, while enabling new design options. Nichia, the leader in and inventor of the high-brightness LED, announces i... READ MORE