I think I poorly explained my thoughts. I noticed on eBay that high powered raw LED arrays like this one 20W Warm White LED Lamp Chip 2800-3500K Bright Light Bulb... (170902780218) are now for sale at reasonable prices. Do not let the wattage's fool you, If you have not seen one of these arrays you will be shocked. the 10 watt version usally use 12 volts, Most of these 20-100 watts run on 36vdc, I do not think driving these with a clean switcher will add to lab noise VS CFL. One of my benches has standard 2 x 48 inch florescent tubes. I was going to mount 5 of these on a 48 inch aluminum extrusion with the supply inside the old fixture. This would be very very bright (Perhaps to bright) with just over 100 watts draw. The conversion will cost about $100 on the surplus market if you had none of the needed items and should pay for it self over the next few years in energy costs. Thomas Knox
> From: [email protected] > To: [email protected] > Date: Mon, 17 Sep 2012 10:21:07 -0400 > Subject: Re: [time-nuts] Reducing lab noise with LED lighting. > > Some of the LED assemblies are stacks of diodes and the Vf is 2.5 to 3.5 > volts. How about powering them from a 3.3 volt PC supply? Plenty of amps > available and those switchers have typically had to have their EMI emissions > cleaned up. > > Tom Holmes, N8ZM > Tipp City, OH > EM79 > > > > -----Original Message----- > > From: [email protected] [mailto:[email protected]] On > > Behalf Of Tom Knox > > Sent: Sunday, September 16, 2012 8:09 PM > > To: Time-Nuts > > Subject: [time-nuts] Reducing lab noise with LED lighting. > > > > > > In this green era here in the USA there is a big push toward CFL lighting. > Problem > > is I can see my CFL lighting on my PN measurements and other equipment. I > am > > finding it is very noisy so I have started researching cost effective LED > lighting > > and was amazed at what is available. On eBay there are 10 to 100 watt raw > chips > > for $2-25.00 but that is equal to about 5 times the lumen of incandescent > lighting. > > I was going to try building the heat sinks and supply into my existing > bench > > fixtures. > > I will post more info soon. > > Thomas Knox > > > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
