6-02-14 12:50:59 EST, you write:
>> BTW, any ballast can be wired to dim the bulbs. I don't have the
>> diagram with me at the moment, but one of my books has it and if someone
>> is interested, I'll try to draw it.
>Only electronic ballasts designed for dimming can be wired to dim bulbs.
>That's one reason they're more expensive than standard electronic ballasts.
>One cannot, for example, put a fluorescent light using magnetic ballasts on
>a dimmer switch. You can try this at home with a compact fluorescent.
>Neither can one dim a T8 on a standard electronic ballast.
>BTW, you're right to be concerned about mixing a T8 electronic ballast with
>T12 lamps. Let's hope it only shortens the life of the lamps; they're
>cheaper to replace.
>San Francisco, CA, USA
>gtong at sirius_com
I will beg to differ. I can't swear that what I said is true(I haven't
wired one up myself), but I do have a wiring diagram for dimming mag.
ballasts. My best rendition is as follows:
---------------- | Ballast |------------power in------
| |----------- |_____________|----------- Power in
| |wire to tube | |______________________________|
| | |_____________ |
| | ________________________ | |
| |--- | flourescent tube |__ | |
Like I said, I have never actually wired up this thing, so I can't be
positive of the results. I this diagram came out as junk, it is located in
the Aquarium Atlas, Vol 1, by Dr. Rudiger Reihl and Hans A. Baensch. I just
happened to replace by shop lamps with a electronic ballast and T8 lamps, so
I have a few bulbs and ballasts left over. I will give it a try and let you
know what happens.