Re: T8s, instant start, and e-ballasts

> >>3) And finally I heard someone mention that e-ballasts designed for a
> >>4' tube shouldn't be used to drive 2' tubes even thought they might
>  >>work. Is this so, and why?

> >For the same reason you wouldn't use a household extension cord to run
> >heavy farm equipment. Current and voltage capacity are important.

> Actually, it's OK to use a current regulated 4 foot electronic ballast
> to drive 2 foot tubes. (snip) Electrically it will be the same load as
> a four foot bulb.

Agreed. But make sure that the load with a different lamp configuration
*is* the same as the ballast rating. Substituting any two lamps for one
won't always work.

Greg. Tong
San Francisco, CA, USA

"Every infinity is composed of only two halves."