I've tried that with a replacement tube that worked with the original ballast, all you had to do was remove the starter.
The results were horrible. The tube was about a metre above my scope and waving the probe about showed horrible spikes and damped oscillatory waveforms up to several volts in amplitude. Needless to say I'm back to a conventional fluoro. The discussion about LED flicker was interesting. As I understand it the human eye can act as a peak detector so it responds quite well to pulsed lights at a high enough frequency. I'm currently (boom boom) illuminating an ornamental vacuum tube display with a strip of white LEDs powered by full wave rectified but unfiltered DC at 100 Hz (in a 50 Hz country). It's in an otherwise dim corner and there's never been any hint of visible flicker to me or anyone else. Morris Date: Tue, 18 Sep 2012 17:22:44 -0500 From: Bob Smither <[email protected]> To: Discussion of precise time and frequency measurement <[email protected]> Subject: Re: [time-nuts] Reducing lab noise with LED lighting. Has anyone tried the fluorescent replacement LED tubes? Apparently you remove the ballast from the fixture and power the tube from the 120V AC line. Any chance these would reduce the noise in a lab from conventional fluorescent tubes? Thanks. _______________________________________________ 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.
