Doc G,Brouce,
Many thanks for your comments.Indeed they made me a
bit wiser in that subject.I believe I didnt realy
listened cerfully to my school teacher when studying
about bulbs and batteries;).Anyhow ,the lightbox seems
to produce equal illumination now.probably the right
combination of bulbs.
Thanks again!
Assaf B.

>
> >
> > Hi Assaf,
> >
> > Nope. It doesn't work that way. :-) Any
> resistors, light bulbs, etc. hooked
> > in series, all have the same amount of current
> flowing through them, no
> > matter how 'far' fro the power source they may
> be. (Ohms Law). And if all of
> > the objects have the same resistance... the bulbs
> would... then all of them
> > will have the same voltage drop across them and
> will use the same power.
> > (Also Ohms Law, or Kirchoffs Law if you prefer.)
> >
> > Anyway, there is no relationship at all between
> how far from the power source
> > an object is and what amount of power it will
> dissipate. Perhaps you have
> > them mounted in some way where the bulbs that just
> happen to be nearest the
> > battery, aren't as obstructed or something like
> that? Just a thought.
> >
> > Bruce Johnston
> >
>
> The above explanation is exactly correct. I will
> not comment on the
> strange theory set out elsewhere. :-)
>
> The current through each is identical. But
> never-the-less these small
> bulbs will generally be of slightly different
> brightnesses because
> they are of different resistance. The quality
> control of the
> resistance in tiny bulbs is very poor. To get the
> bulbs to be of
> similar brightness, you will need to get some extra
> bulbs and keep
> replacing bulbs until you get a matched set. You may
> find that you
> have to try again as many bulbs to get a closely
> matched set.
>
> Doc G
>


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