Hello Brian, Not sure if anyone answered you yet but we measure it at the power source. The interest is in the driver.
Best regards, Jason L. Chesley Strategic Account Manager CSA International / OnSpeX 2210 Justin Trail Alpharetta, GA 30004 P: (678) 992-0134 M: (404) 414-5547 F: (770) 500-3948 [email protected] www.csa-international.org www.getOnSpeX.com From: [email protected] [mailto:[email protected]] On Behalf Of Brian O'Connell Sent: Tuesday, December 15, 2009 5:17 PM To: [email protected] Subject: Energy Star Requirements for LED Luminaries Good People, The "LED Operating Frequency" requirement, released 03Dec2009, is at least 150Hz. Is this frequency measured at the LED power source or is it measured as a flicker in the LED's visible wavelength emissions ? Nobody at the DoE likes me enough to reply. thanks, Brian - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> This message is intended only for the use of the person or organization to which it is addressed, and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, or responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by email and delete the original message immediately. The sender, its subsidiaries and affiliates, do not accept liability for any errors, omissions, corruption or virus in the contents of this message or any attachments that arise as a result of e-mail transmission. Thank you. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
