Victor Roberts wrote:
On 1 Dec 2006 04:57:15 -0800, wrote:
machinery strobing is possible with mag ballasts, but doesnt normally
happen,
actually it happens 100% of the time on single lamp
ballasts, through it is usually called flicker.
and does not make it look stationary even when it does.
Since the depth of the modulation is less than 100% and it
is unlikely that the mixer blades are rotating at a multiple
of the power line frequency I agree with you on this point.
So a problem with strobing does not normally occur.
A high level of light is output over a large percentage of the cycle,
which is another factor.
And cake mixers are well interlocked 
And where do you find a mixer that is interlocked against a
hand in the "blades" or whatever they are called? Certainly
not mine.
ok, lets get more thorough about that then. There are 2 types of cake
mixing machines:
1. high speed sharp bladed food processors that always have interlocks.
Interlocking prevents any hand contact with moving blades. There is
also the fact that in use one does not see spinning blades, but rather
a mass of moving food. And the food does not move fast enough to apear
stationary
2. low speed blunt paddle devices that are open. These move so slowly
it is not possible to encounter a strobing problem with fl lighting on
50 or 60Hz. The blades move such a small amount between each half cycle
that this simply can not be a problem.
So there is no risk at all in using mag ballasted fl lighting with cake
mixers.
NT