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F20T12 Philips ALTO lamp with 1 broken cathode + LPF 1 lamp trigger start ballast + circuit interrupting lampholder = interesting effect

F20T12 Philips ALTO lamp with 1 broken cathode + LPF 1 lamp trigger start ballast + circuit interrupting lampholder = interesting effect

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This was done by putting the broken cathode end of the lamp in the circuit interrupting lampholder, putting the lamp in so it lit, and orienting it so it no longer lit. The path of current is like an autotransformer ballasted preheat lamp without cathodes. I think the arc is from one end of the used-to-be cathode filament to the other end of it.

20180816_222849.jpg 20180816_223002.jpg 20180721_211249.jpg 20180719_121338.jpg

Light Information

Light Information

Manufacturer:Philips
Lamp
Lamp Type:F20T12
Filament/Radiator Type:Preheat
Base:Medium Bi-pin
Shape/Finish:T12
Fixture
Fixture Type:Fluorescent
Ballast Type:Magnetic
Socket Type:G13
Location:On The Floor Of My Room
Electrical
Wattage:20 Watt (Total Power 33 Watt)
Voltage:120 Volts
Current:0.6 Amps
Optical
Color Temperature:Daylight
Physical/Production
Factory Location:USA (With Chinese Quality)
Fabrication Date:January 2018
Application/Use:Entertainment

File information

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Filename:20180721_211249.jpg
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Keywords:Lamps
File Size:147 KB
Date added:Jul 21, 2018
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Fluorescent05
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Jul 24, 2018 at 06:06 AM Author: Fluorescent05
What causes an arc to strike between the two pieces of the filament?

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dor123
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Jul 24, 2018 at 06:39 AM Author: dor123
See here .
This is usually occurs on preheat/switchstart, when the filament is broken. As this is the easiest place for the gas to ionize. This is very similar to the glow of a neon indicator or starter.
But this is very bright for a glow discharge between the two pieces of the filament.

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

Fluorescent05
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Jul 24, 2018 at 02:38 PM Author: Fluorescent05
This is from the blue wire to neutral of an LPF trigger start ballast. The ballast neutral is disconnected because the lampholder is circuit interrupting and the lamp is only partially in the socket.

I can't pretend a stranger is a long awaited friend. -Neal Peart

Fluorescent05
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Aug 11, 2018 at 08:03 AM Author: Fluorescent05
This lamp gets really angry when I put it on an electronic instant start ballast now.

I can't pretend a stranger is a long awaited friend. -Neal Peart

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