I saw an amazing display of LED shield room lightning. The LEDs (and more importantly) all the wiring, are totally outside the chamber. A light pipe penetrates the chamber ceiling at regular intervals through a stuffing tube (waveguide beyond cut off).
It should be noted that this chamber has white absorber; this would not have worked with black ferrite tile or blue cones. At least it would have taken many more luminaries. Ken Javor Phone: (256) 650-5261 > From: "Kunde, Brian" <[email protected]> > Date: Mon, 4 Feb 2013 18:22:05 +0000 > To: "[email protected]" <[email protected]> > Conversation: LED Chamber Lighting > Subject: LED Chamber Lighting > > Has anyone tried out LED Lighting in EMC test chambers? If so, can you share > your experience, opinions, likes and dislikes, and cost? > > I have recently seen several ads for LED Light Fixtures and replacement kits > where a 100watt LED light can replace a 400 watt Metal Halide bulb or fixture. > But I have some concerns: > > 1. Are LED as bright? > 2. The ETS-Lindgren datasheet claims "No RF Noise into the test chamber". > Seems too good to be true. Are these lights special for ETS or are there over > the counter LED fixtures that will work just as well? > 3. Cost? Are there generic lights that would work as well but be cheaper? If I > hold off a year or two do you think the price will drop significantly? > 4. What other pros and cons are there? > > > We have eight metal halide light fixtures in our chamber. Currently we have to > replace the bulbs every two years because of rf emissions from bulb arcing. We > replace the ballasts at 10 years because of loud buzzing. Though the metal > halide bulbs are relatively inexpensive, we have to rent a lift for several > days to work on the lights. Plus the cost of having the lights worked on every > other year and our chamber being down for a few days. LED lights have the > potential of being maintenance free for 15 years or more. In the long run it > should save us money. This might be something to put on my capital equipment > list for next year. > > I'm curious to hear any input you might have on this topic. > > Regards, > The Other Brian > > > ________________________________ > > LECO Corporation Notice: This communication may contain confidential > information intended for the named recipient(s) only. If you received this by > mistake, please destroy it and notify us of the error. 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.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used > formats), large files, etc. > > 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 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.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. 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]>
