Re: DIY light source for 10X10" enlarger.

On 4/10/2008 2:53 PM Nicholas O. Lindan spake thus:

> Office lighting systems usually supply a high (and usually
> bizarre - 347 volts anyone?) voltage from a central
> step-up transformer with individual inductive ballasts
> at each lamp.

Small correction: 277 volts. (It's printed on lots of ballasts.)


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