Posted by Philip Doolittle on February 07, 2009 at 11:50:45 from (96.248.135.120):
In Reply to: HO Flourescent Lights posted by Jeff NWOH on February 07, 2009 at 10:24:50:
The Ballast is a regulator/transformer which puts out a surge(voltage spike) to initate the arc inside the bulb. It also lights the filaments so that they give off electrons to carry the arc. With that said the temperature(cold)air does not start the arc because #1 bulb cold #2 filament cold #3 ballast windings and capacitor cold. Why it sometimes lighs when you flick the switch is you are getting the lamp trying to start on one of the voltage spikes. Also MOISTURE/frost in unheated areas shunts off some of the energy from the bulbs when they are starting to arc. Solutions include using a LOW temperature Ballast (more$),wiping off the fixture and lamp with a clean dry cloth putting in a new Bulb preferably cool white mfg by a GOOD mfgr,and making sure the voltage is 120 volts not 110 on your circuit or 240 not 220 on that voltage ballasts.Leaving the lamps turned on when they don't light ages the lamps(black tinted ends) AND WILL burn out the ballast!!. Possibly a fire starter. MOST flourscent fixtures should be mounted with Air around the fixture and not flush mounted or enclosed. Hope this helps. God Bless America
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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