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Re: [APD] What I've forgotten would make a great book.


I remember from a design project many years ago that an electronic ballast on a 4' tubelight rated 40W consumes only 26W.

The power consumption increases as the tube ages. Light output decreases. I wish the manufacturers would incorporate an indicator on the tube that will tell us end of life is approaching.

Raj

In 1989 I posted to usenet:

>1) 2 electronic ballasts. Not the cheap magnetic ones that come in
>shop lights. With electronic ballasts and two 48" tubes, about
>100 watts will be used, vs. 250 for magnetic. If that kind of
>power consumption is not a concern use the magnetic ones.

(looks over at tanks with 4 magnetic ballasts, looks at electricity
bill on desk)

Uh-oh... Somebody tell me I was wrong. Nobody did back then.
-

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