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F14T12 running on low voltage DC

F14T12 running on low voltage DC

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Just a little experiment I thought I would try. I connected a 32 volt power supply, a 15 volt power supply, and a 13 volt power supply in series to give an OCV of about 60 volts, and a 150 watt incandescent lamp was used as the ballast. The lamp was manually preheated. Oddly, if you preheat the lamp for a good couple of seconds, it wouldn't strike at all, but if you preheat for just a split second, it will strike. I assume this is because the quicker preheating allows the lamp to strike before the incandescent ballast heats up and raises in resistance.

The anode side of the lamp had a noticeable dark spot, but no sign of mercury migration occurred after an hour of running. Wasn't the F14T12 developed for running on DC power from streetcars and such?

IMG_1047.jpg IMG_0938.JPG IMG_1018[1].JPG IMG_0784.JPG

Light Information

Light Information

Lamp
Lamp Type:F14T12
Fixture
Ballast Type:Incandescent
Electrical
Voltage:60 VDC

File information

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Filename:IMG_1018[1].JPG
Album name:themaritimegirl / Experiments, Projects, & Mods
Keywords:Lamps
File Size:240 KB
Date added:May 11, 2014
Dimensions:2050 x 1537 pixels
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LandryB
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May 09, 2015 at 05:00 PM Author: LandryB
Can you run two F14T12 in series on 120v? What type of starters would work?
themaritimegirl
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May 09, 2015 at 05:41 PM Author: themaritimegirl
Yep! Two plain old FS-2 starters do the trick.

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May 09, 2015 at 05:53 PM Author: Solanaceae
You can also run two f20s in series on a single lamp f40 ballast with a fair OCV.

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