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#59914 - 12/18/05 05:22 PM flourescent light fixture
circuit man Offline

Registered: 11/05/01
Posts: 287
Loc: saluda,s.c.
here's a good one that has me stumped, about the above. bought a brand new fixture a couple of months ago,the rapid start type belive it's 20 watt ,two bulb. the problem is sometimes it comes on by itself sometimes not.i have changed ballasts, grounded it properly,& it still takes a notion not to work it doesn't.both ends of each bulb glow but want seem to start.but as soon as i touch the fixture it comes on.the bulbs are as close to the frame as possible.i had those $8 shoplights to work with only two wires before i got my shop wired. they never give a bit of a problem.even the ballast maker couldn't answer my problem.they even sent free replacements.but sometimes ya flip the switch & it comes right i wonder what the problem coud be?

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#59915 - 12/18/05 06:03 PM Re: flourescent light fixture
mxslick Offline

Registered: 10/24/04
Posts: 785
Loc: Atomic City, ID USA
Try changing the bulbs. Since the big environmental crusade, F-lamps contain a lot less mercury than before. (The mercury vaporizes and aids in starting.)

And avoid the ones with green end caps, they're the worst!!

Even with name brands, defective bulbs seem common these days.
Stupid should be painful.

#59916 - 12/18/05 10:22 PM Re: flourescent light fixture
hbiss Offline

Registered: 12/16/03
Posts: 893
Loc: Hawthorne, NY USA
Agreed. I have solved this same problem by using another manufacturer's lamps. U tube fixtures are notorious for this. I have had good luck with GE bad luck with Phillips. Also, as said try to stay away from the energy saving reduced wattage low mercury ones. The full wattage energy hogs usually work best. Maybe the energy saving lamps save energy because they don't work half the time.


#59917 - 12/19/05 04:18 AM Re: flourescent light fixture
LearJet9 Offline

Registered: 04/24/05
Posts: 196
Loc: Millis, MA USA
Change to T8 lamps with an electronic ballast, your problem will be solved.

#59918 - 12/19/05 04:24 AM Re: flourescent light fixture
Dnkldorf Offline

Registered: 12/12/04
Posts: 1091
Loc: nowhere usa
+1 for the T-8....


#59919 - 12/19/05 07:12 AM Re: flourescent light fixture
renosteinke Offline
Cat Servant

Registered: 01/22/05
Posts: 5305
Loc: Blue Collar Country
Just for grins & giggles, look closely at the wiring diagram on the ballast. It sometimes matters which bulb (or bulb end) gets fed first.

#59920 - 12/19/05 02:06 PM Re: flourescent light fixture
circuit man Offline

Registered: 11/05/01
Posts: 287
Loc: saluda,s.c.
THANKS GUYS! i'll check on the parents are about to drive me nuts abot this. especially my mom!LOL!why would touching the fixture cause the to come on though?i'm lost on that one. but it seems to work every time.

#59921 - 12/19/05 03:09 PM Re: flourescent light fixture
jwhite Offline

Registered: 12/01/05
Posts: 67
Loc: Trenton, NC, USA
when you touch the bulb you get the little molicules of phospores (sowwy spelling) excited.

#59922 - 12/19/05 04:17 PM Re: flourescent light fixture
Edward Offline

Registered: 12/14/02
Posts: 309
Loc: California
Do you have to wait for a while then touch the fixture for it to come on?

Could there be a loose connection or a bad/corroded connection in the line somewhere that you do not get the full supply voltage when you turn the switch on?

#59923 - 12/20/05 03:52 PM Re: flourescent light fixture
circuit man Offline

Registered: 11/05/01
Posts: 287
Loc: saluda,s.c.
hi ed, no paticular time involved. was down there tonight & it came right on twice. the third time it didn't. touched it ,then it came on. sometimes you would turn it off & it would come right on.i know flourescent lamps are tempature senstive.but this doesn't seem to be the case.all connections are ok too. i may try some different bulbs.then i may attach a wire to the fixture so they can touch it.LOL!

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