[RFI] Flourescent lighting

Roger (K8RI) k8ri at rogerhalstead.com
Sat Jul 30 19:12:30 EDT 2016

Now if they only made them in 8' lengths, full spectrum and 5000 lumens.


Roger (K8RI)

On 7/30/2016 Saturday 5:21 PM, John K9UWA wrote:
> I just replaced 24 of these 48 inch flourexcent bulbs in our workshop and
> garage. I used the following LED 48 inch bulbs.
> EarthLED.com
> Thinklux LED Fluorescent Replacement Tube - 4 Foot - 18 Watt - Ballast
> Bypass - DLC Qualified - Shatterproof - 4000K
> Whats the difference? Well consider this. I use a Sony Transistor all band
> radio to look for noises. Sony model ICF-2001 advantage to this one is no
> automatic noise blanker in the radio. Tunes AM up through FM in AM
> SSB/CW or FM modes. In the  AM broadcast band If I got within about 20
> feet of one of the original two bulb fixtures this radio lite up all 5 bars for
> whatever that is worth in noise. No calibration of the meter. Lots of noticable
> dB's of audible noise. Vs the LED bulbs in the same fixtures. You have to
> get the antenna within a foot of the fixture before you begin hearing the
> noise.
> The Ballasts are removed. Slight rewire of full AC line voltage to one end of
> the bulbs. Yes internally inside each bulb is a small switcher type supply. It
> must have some filtering as they make very little noise.
> So the PRO's of these bulbs are.
> #1 very little RF noise
> #2 notice they burn 17 watts of power rather than the standard 30 watt or
> more bulbs. Your Light bill just went down to HALF to burn the bulbs.
> #3 they have a 50,000 hour life rather than almost monthly I was in the
> workshop replacing at least one or two bulbs. And at least one ballast per
> year.
> It takes maybe 10 minutes per fixture to rewire and install the LED
> replacement bulbs.
> I would think that some stores where these lights burn for maybe 14 to 16
> hours per day that the electricity savings and the not having to replace the
> bulbs would be enough encouragement for store owners to replace those
> noisey Flourescent bulbs / ballasts.
> In boxes of 20 bullbs per box they are $180 or $9 per bulb. Cheaper yet if
> you buy them in 100 lot purchases.
> John k9uwa
> John Goller, K9UWA & Jean Goller, N9PXF
> Antique Radio Restorations
> k9uwa at arrl.net
> Visit our Web Site at:
> http://www.JohnJeanAntiqueRadio.com
> 4836 Ranch Road
> Leo, IN 46765
> 1-260-637-6426
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