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Lighting and Electrical ? (Read 1,982 times)
 
Mike Turner
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Lighting and Electrical ?
Apr 27th, 2011 at 2:54pm
 
I have 2 T12 8' lights  and 2 4'  fluorescent lights in my  20 by 20 shop. The 8' ones are 15 yrs old...This morning I went in and one bulb vibrated and so I turned the bulb and noticed the bulb holder on the end had turned a little brown and a little of the part that holds the end of the bulb was melted and wouldnt hold the bulb anymore...I am going to replace it but am undecided whether to go back with  fluorescent bulbs again.  Could this have caused a fire ? What other type bulbs would someone suggest??  Should the fixtures have the dust blown from them occasionally??? Thanks for any ideas !!!
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Chuck Beland
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Re: Lighting and Electrical ?
Reply #1 - Apr 27th, 2011 at 5:14pm
 
Mike I don't know enough about the electrical but, using my common sense I would say yes you could have had a fire due to the oxidation or the end heating up. I say throw it away & get a new one. Cleaning the lights will not hurt anything it will help keep the sawdust away from the contacts.
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Mike Baber
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Re: Lighting and Electrical ?
Reply #2 - Apr 27th, 2011 at 6:23pm
 
WoW Mike, sounds like you were close to having a fire if the tombstone was burnt. I have seen them burn like that because of dust and such, its wise to clean the fixtures often by blowing them out. While your at it you might want to check your ballast and if its really, really HOT, you might want to change it as well. You can get all the replacement parts at a Lowes or a Home Depot, just make sure you kill the power if you do it yourself.

One of the best bulbs to use is what they call a soft white, puts out alot of light and doesn't get near as warm as the standard bulbs and if you do replace the ballast, just make sure you get the correct one for your set up.
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« Last Edit: Apr 27th, 2011 at 6:25pm by Mike Baber »  

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Chuck Beland
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Re: Lighting and Electrical ?
Reply #3 - Apr 28th, 2011 at 3:40am
 
mIKE,
sOMETIMES IT'S CHEAPER TO JUST GET A NEW LIGHT THEN CHANGING THE BALLAST. The cost of a new ballast can be just as much as a new light.
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Re: Lighting and Electrical ?
Reply #4 - Apr 28th, 2011 at 8:28am
 
Mike,

I'm an electrician who's now been in the office for 30 years.  Please do me a favor and remove those fixtures.  If they are as old as you say, then the ballasts might be PCB ballasts - which are extremely hazardous - and it sounds like those tombstones and lamps are WAY shot.  Yes, arching can start a fire.  I have 4' "shop lights" in my shop which work well but I  supplement them with specific task lighting using compact fluorescents with "daylight" lamps which give me better color rendering.  The newer fluorescent lighting has electronic ballasts (not magnetic) and I think you will be pleased with the "buzz reduction."  In addition, I'd get good quality fixtures with T-5 lamps - if you can't find those then next bet would be T-8's.  Get away from the horribly inefficient T-12's.

Hope this helps
Doug
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Re: Lighting and Electrical ?
Reply #5 - Apr 28th, 2011 at 11:29am
 
And there is a strong chance that T12 bulbs may not be available in the near future.

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Re: Lighting and Electrical ?
Reply #6 - Apr 28th, 2011 at 5:48pm
 
Doug,
I haven't seen any of the T5 bulbs?  When I put in my 4' double light fixtures the guy at HD told me to get the T8 ones cause they're phasing out the T12's  What is the difference between the T5 & T* ones?
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JimQuarles
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Re: Lighting and Electrical ?
Reply #7 - Apr 28th, 2011 at 7:30pm
 
A typo.  I haven't heard of T5.  T12 is the designation for the older style 40 watt fluorescent tubes.  T8 is the designation for the newer slender, high efficiency tubes.

JimQuarles
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david seaba
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Re: Lighting and Electrical ?
Reply #8 - Apr 28th, 2011 at 7:42pm
 
I use and change ballast on all the lights you have mentioned at work. They are phasing out the t12. you can put a new ballast in your old fixture and use the t8 bulbs I do it all the time at work.  But if its a cheap fixture. than you better of getting a whole new t8 the t5 are pricey. The t5 are even nicer then the t8 in are new 355,000 sq ft building that's what is being used. Hope that helps
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Re: Lighting and Electrical ?
Reply #9 - Apr 29th, 2011 at 1:17am
 
JimQuarles wrote on Apr 28th, 2011 at 7:30pm:
A typo.  I haven't heard of T5...


Not a typo. Google is your friend -

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(I hadn't heard of them either.) Wink
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Mike Turner
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Re: Lighting and Electrical ?
Reply #10 - Apr 29th, 2011 at 3:59am
 
I took down the old ones and am putting up T8s Thanks everyone for all the input...You guys always come up with right info !!!!
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Re: Lighting and Electrical ?
Reply #11 - Apr 29th, 2011 at 9:43am
 
Nope, not a typo.  T-5's are widely used now in warehouse's, gyms and areas where lots of light is needed.  Keep in mind that the "T" designation: T-12, T-8 etc are designations of lamps by diameter by 1/8" inch.  So a T-5 is 5/8" inch diameter.  Now that said, I do believe that T-5's are probably too bright for the average shop (and probably too much glare)...so unless you have 20' ceiling in your shop go with T-8's.  Slightly less efficient, but plenty of light.
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Mike Turner
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Re: Lighting and Electrical ?
Reply #12 - Apr 30th, 2011 at 12:40pm
 
The T8s are up and going ...Really like them alot
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