I do not know ?

[mowhoong]

My house uses 4 fts length fluorescent light ( 20 W ) as lighting
source. When I remove the starter the light is still light up. I like
to know why it is working when the fluorescent light is in open
circuit ? Can any person help me ? Thanks

 

[mowhoong]

On Aug 11, 11:03 am, "Bob Eld" <nsmontas...@yahoo.com> wrote:

"mowhoong" <mowho...@hotmail.com> wrote in message

news:26c0aad6-75f7-462d-899d-ad14353ea212@w39g2000prb.googlegroups.com...

My house uses 4 fts length fluorescent light ( 20 W ) as lighting
source. When I remove the starter the light is still light up. I like
to know why it is working when the fluorescent light is in open
circuit ? Can any person help me ?  Thanks

The starter doesn't do anything once the lamp starts. Its purpose is to
complete a circuit when cold that allows the filaments in the lamp to light.
Then, after several seconds to open the circuit causing an inductive kick or
voltage spike from the inductive ballast that strikes an arc or gas
discharge in the tube and the lamp lights. Once the lamp lights, the
filaments go off and are not required for normal operation, only starting..

With the lamp operating you can remove the starter as it does nothing once
the lamp is on. The starter is now in an open circuit condition.

However, once the lamp is off and cold, it will not restart without the
starter to break the circuit again and repeat the process.

Try starting the lamp cold without the starter. It may restart while warm
without the starter. Be sure to allow it to totally cool.

Many modern lamps don't use starters and don't use the above process for
starting..

Thanks Bob !