elson at pico-systems.com
Fri Feb 6 23:25:57 CST 2015
On 02/06/2015 09:20 PM, Tothwolf wrote:
> These are single-ended-power type retrofit tubes, so a
> rapid start ballast really shouldn't harm them (the two
> pins on one end are not connected to the circuit). The
> older double-ended-power type retrofit tubes are the ones
> to be afraid of...they are a shock hazard (well
> documented) if both ends of the tube aren't fully seated.
> The double-ended-power types are also now banned in many
OK, good to know that they fixed THAT bit of insanity!
> Are you sure those tubes on Amazon require the ballast to
> be removed? Many of these retrofit tubes do not, although
> some require the starter circuit to be bypassed. [In the
> US, with 4ft T12 and T8 fixtures, the starter circuit is
> built into the ballast, but that convention isn't
> universal, and in many countries fluorescent fixtures use
> a separate starter module in a socket.]
I haven't seen anything except desk lamps that used a
separate starter (or manual
button) in the last 30 years or so.
Our house was built in 1975 and the 4' fluorescent fixtures were
all rapid-start ballasts, meaning the starter is part of the
Anyway, I'd sure WANT to remove the old ballasts, as they
inefficient. I measured one of the ones before I did the
retrofit. Two 48"
tubes, total power draw 103 W. Assuming the two tubes drew
32 W each,
the ballast was drawing another 39 W or so! I had to remove
with pliers, it was too hot to touch after a couple hours run.
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