well that was my point rvm. it isn't just a matter of plugging something in.
maybe I didn't explain the technical stuff properly because I seem to have confused you Matty too! sorry. I don't really want to debate this, but I suppose it is kind of on-topic if anybody wants to implement a dimming system.
Fluorescent lights work like
this:
the
ballast is one of these
these
the
starter is one of these
these
clearly it is not just a matter of plugging the ballast in (starters are generally easy to screw in). it must be wired in. and if you want a dimmer ballast then the wiring is even more complicated.
my tank comes with the ballast integrated into the plastic hood and is therefore waterproof. the starter is integrated in there somewhere too.
to switch the ballast/starter/tube combination on, to produce light, a lot of people use a
timer like
these on their tanks. clearly plugging one of these in is no harder than plugging any other device in and no electrician is neccessary for that part.
I think you are confusing a
timer for a
starter. which is easy to do, since starter is by no means an inaccurate name for the timer (just not the correct technical name to use if you are searching for, or ordering the part).
Your idea is good Jim. It might even be possible to DIY a round tube with varying degrees of shading around its circumfrence, which fits over the fluorescent tube (might have to consider heat issues) and make it rotateable with a knob to form a mechanical dimming switch.