On 2017/06/28 6:58 PM, Phil Allison wrote:
John Robertson is a Google Monkey

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So, perhaps theatre halogen bulbs are designed to be dimmed?


** Perhaps your fat arse is on fire ?

Ever think of that?

Not sure what that has to do with the question raised by your source
(wikipedia) where the point was raised that theatre lighting had their
own expectations about the use of halogen bulbs.




"Halogen lamps are designed to operate at very high temperatures to
ensure optimal performance. Dimming at above 60% of the rated volts can
be done. It is recommended to revert to full brightness for one minute
prior to switching the lamps off."


** Drivel, not real information.


Excuse me Phil, but I was quoting from YOUR wikipedia reference source,
not mine.


In other words do not run them above 60% of rated line voltage for
extended times without heating/running them at 100% for one minute prior
to turning off. I am SURE everyone will do that!


** The false warning is about running halogen BELOW 60% rated voltage.

Not the same thing, they are using the word above to mean above 60% of
rated voltage, not below 60% rated voltage. At least that was how I read
your source - the wikipedia article quoted by you in previous email.
Which I read.


60% equates to about 10 to 15% of normal light output which is very dim.


BTW:

Ever see or use a halogen down light?

Standard practice is to run them off dimmers at any level you like.

Of course, people will do whatever they like - that was not the
question. The original question was was it a good idea to run halogen
lights on dimmers and would it adversely affect their rated life span.


Googling finds you every piece of misinformation that ever existed.

..... Phil


You may be an excellent designer of electronics, but are you a halogen
lighting expert too? Or are you (like me) just putting forward opinion
based on personal research and/or anecdotal experiences? This is
supposed to be a learning tool for all concerned after all, is it not?

John