computer building? was[rescue] Noise levels

[Chad Fernandez]

James Lockwood wrote:
> You are probably seeing 120Hz flicker from magnetic or older electronic
> ballasts.  This can be within the human range of perception, especially if
> the bulbs are at all worn, cold, or of the "energy saving" variety.  I see
> flicker in my T12's in my garage, but I supplement them with other
> lighting.

Your not talking about the light rings in the tubes are you?  I notice 
that old or cold bulbs will have traveling light rings inside the tubes.

I haven't worked under flourescent lights for quite some time.  I do 
recall being irritated sometimes by the light, but in general I like 
them.  What I don't like are black light tubes..... the glare kills me. 
  Those probably wouldn't be used as primary lighting in a server room, 
However :-)

Chad Fernandez
Michigan, USA