• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Flourescent light starter

Not open for further replies.


New Member
I am interested in a circuit that will start a 20w flourescent tube, a circuit that does not use any coils. Thanks. hermhart


Active Member
Without coils it is not possible start a fluorescent light.


Active Member
Hi hermhart,

If you live in a place where the supply voltage is
240 volts, you can strike the smaller tubes without
a ballast or transformer.

Kinjalp, i take it your supply is 120v, yes ?

Once lit the gas assumes a fairly low resistance,
so the current has to be limited, this is usually by
a capacitor in series with the unit normally to live.

When the starter changes state, the gas gets put into
circuit, the heaters become just electrodes.

I dont think this arrangement works on 120 volts.
But discharge tubes are a funny lot, there might be
some that do.

Regards, John



Active Member
No, John, I have 220V in my country but I thought he wants a 4 feet tubelight to start without coils which is impossible unless you have a device which can generate high voltage similar to what a series RLC circuit does at resonant frequency.
Not open for further replies.

Latest threads

EE World Online Articles