[BC] to fluorescents

[Powell E. Way III W4OPW]

--- nakayle at gmail.com wrote:

> Modern fluorescents use electronic ballasts which
> operate at
> frequencies so high there is no discernible flicker.
>  Of course there
> are still a lot of magnetic ballasts around but they
> are rapidly being
> phased out along with the old T12 style bulbs in
> order to meet new
> efficiency requirements.

There are some good magnetic ballasts and there are
good high efficiency T12 bulbs. The Sylvania D865 is
very bright with superb color correction. It's 6500K
and well, not inexpensive. It's around $12 a bulb.
It's a good bit brighter than almost all of the T8
bulbs with electronic ballasts, but only by a few
hundred lumens.  In the control room at WKDK I have
some 5000K  color corrected bulbs. They are only 2200
lumens with 90+ % color correction. They SEEM brighter
than the old 4100K low color corrected bulbs that have
a much higher lumen count. And it seems cleaner and
fresher than the ugly old "Cool White".....


Powell

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