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#1
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Fluorescent light bulb or ballast?
I flicked the light switch in the bathroom and only one of the 4
fluorescent light bulbs came on. After about a minute or so, the other three came on. I turned it off and let it sit for 10-15 minutes and tried it again. All 4 came right on. Should I replace all 4 bulbs or is it likely the ballast (is that the right word) that is going bad? |
#2
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Fluorescent light bulb or ballast?
On 2/20/2012 6:11 PM, Jennifer Murphy wrote:
I flicked the light switch in the bathroom and only one of the 4 fluorescent light bulbs came on. After about a minute or so, the other three came on. I turned it off and let it sit for 10-15 minutes and tried it again. All 4 came right on. Should I replace all 4 bulbs or is it likely the ballast (is that the right word) that is going bad? If these are T-8 fluorescent lamps, there is probably only one ballast. The problem is likely the lamp or it's connection at the socket. If these are T-12 fluorescent lamps, there are two ballasts. The problem is still more likely the lamp or it's connection at the socket. |
#3
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Fluorescent light bulb or ballast?
On 2/20/2012 6:11 PM, Jennifer Murphy wrote:
I flicked the light switch in the bathroom and only one of the 4 fluorescent light bulbs came on. After about a minute or so, the other three came on. I turned it off and let it sit for 10-15 minutes and tried it again. All 4 came right on. Should I replace all 4 bulbs or is it likely the ballast (is that the right word) that is going bad? Sorry, I read it, or at least interpreted it backwards. (dyslexia or something) That sounds like something flaky with an electronic ballast.(T-8) Doesn't seem likely to occur with a pair of magnetic ballasts (T-12) May just be an anomaly, see if they continue to work properly. |
#4
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Fluorescent light bulb or ballast?
On Mon, 20 Feb 2012 15:11:05 -0800, Jennifer Murphy
wrote: I flicked the light switch in the bathroom and only one of the 4 fluorescent light bulbs came on. After about a minute or so, the other three came on. I turned it off and let it sit for 10-15 minutes and tried it again. All 4 came right on. Should I replace all 4 bulbs or is it likely the ballast (is that the right word) that is going bad? Wiggle (rotate) each bulb (adjust) , see if that helps. Try it before replacing parts. It could be a poor contact of the bulb(s) on the fixture. YMMV |
#5
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Fluorescent light bulb or ballast?
On 2/20/2012 5:11 PM, Jennifer Murphy wrote:
I flicked the light switch in the bathroom and only one of the 4 fluorescent light bulbs came on. After about a minute or so, the other three came on. I turned it off and let it sit for 10-15 minutes and tried it again. All 4 came right on. Should I replace all 4 bulbs or is it likely the ballast (is that the right word) that is going bad? What was the temperature in your bathroom? If it was cold in there, the lights may take a while to come on. Someone may have already mentioned wiggling the bulbs because in a bathroom exposure to a lot of moisture could have cause a bit of corrosion on the bulb contacts. TDD |
#6
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Fluorescent light bulb or ballast?
On Mon, 20 Feb 2012 20:05:50 -0600, The Daring Dufas
wrote: On 2/20/2012 5:11 PM, Jennifer Murphy wrote: I flicked the light switch in the bathroom and only one of the 4 fluorescent light bulbs came on. After about a minute or so, the other three came on. I turned it off and let it sit for 10-15 minutes and tried it again. All 4 came right on. Should I replace all 4 bulbs or is it likely the ballast (is that the right word) that is going bad? What was the temperature in your bathroom? If it was cold in there, the lights may take a while to come on. Someone may have already mentioned wiggling the bulbs because in a bathroom exposure to a lot of moisture could have cause a bit of corrosion on the bulb contacts. The house is in south Florida, so it's warm and humid. Plus it's a bathroom without good ventilation. We were out for several hours. When we got back, the lights went right on. Tomorrow, I'll remove the bulbs and check the contacts for corrosion. I suspect the bulbs are fairly old. It's my mom's house, and she is not sure when they were last replaced. Thanks |
#7
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Fluorescent light bulb or ballast?
On Feb 20, 9:18*pm, Jennifer Murphy wrote:
On Mon, 20 Feb 2012 20:05:50 -0600, The Daring Dufas wrote: On 2/20/2012 5:11 PM, Jennifer Murphy wrote: I flicked the light switch in the bathroom and only one of the 4 fluorescent light bulbs came on. After about a minute or so, the other three came on. I turned it off and let it sit for 10-15 minutes and tried it again. All 4 came right on. Should I replace all 4 bulbs or is it likely the ballast (is that the right word) that is going bad? What was the temperature in your bathroom? If it was cold in there, the lights may take a while to come on. Someone may have already mentioned wiggling the bulbs because in a bathroom exposure to a lot of moisture could have cause a bit of corrosion on the bulb contacts. The house is in south Florida, so it's warm and humid. Plus it's a bathroom without good ventilation. We were out for several hours. When we got back, the lights went right on. Tomorrow, I'll remove the bulbs and check the contacts for corrosion. I suspect the bulbs are fairly old. It's my mom's house, and she is not sure when they were last replaced. Thanks Jennifer, Remove all four tubes. With a slightly damp rag, wipe down all the tubes to get any accumulated dirt off the glass and the ends. Dry thoroughly and put the tubes back. Not if any have fairly blackened glass at the ends of the tubes. Replace the tubes. See what happens. If one light lights right away, note that tube and mark it somehow. Switch the good tube with any of the other three tubes. See what happens when you turn the fisture on. Does the good tunbe light, or does the replacement tube light. If the replacement tube lights, the ballast is liekly to be bad.. IF the good tube still lights, the other tubes is probably bad. |
#8
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Fluorescent light bulb or ballast?
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#9
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Fluorescent light bulb or ballast?
On Feb 20, 6:11*pm, Jennifer Murphy wrote:
I flicked the light switch in the bathroom and only one of the 4 fluorescent light bulbs came on. After about a minute or so, the other three came on. I turned it off and let it sit for 10-15 minutes and tried it again. All 4 came right on. Should I replace all 4 bulbs or is it likely the ballast (is that the right word) that is going bad? Strange as it sounds it may be the bulb that is coming on is the bad one. Jimmie |
#11
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Fluorescent light bulb or ballast?
On Feb 21, 5:27*pm, Jennifer Murphy wrote:
On Mon, 20 Feb 2012 19:58:45 -0800 (PST), "hr(bob) " wrote: On Feb 20, 9:18*pm, Jennifer Murphy wrote: On Mon, 20 Feb 2012 20:05:50 -0600, The Daring Dufas wrote: On 2/20/2012 5:11 PM, Jennifer Murphy wrote: I flicked the light switch in the bathroom and only one of the 4 fluorescent light bulbs came on. After about a minute or so, the other three came on. I turned it off and let it sit for 10-15 minutes and tried it again. All 4 came right on. Should I replace all 4 bulbs or is it likely the ballast (is that the right word) that is going bad? What was the temperature in your bathroom? If it was cold in there, the lights may take a while to come on. Someone may have already mentioned wiggling the bulbs because in a bathroom exposure to a lot of moisture could have cause a bit of corrosion on the bulb contacts. The house is in south Florida, so it's warm and humid. Plus it's a bathroom without good ventilation. We were out for several hours. When we got back, the lights went right on. Tomorrow, I'll remove the bulbs and check the contacts for corrosion. I suspect the bulbs are fairly old. It's my mom's house, and she is not sure when they were last replaced. Thanks Jennifer, Remove all four tubes. *With a slightly damp rag, wipe down all the tubes to get any accumulated dirt off the glass and the ends. *Dry thoroughly and put the tubes back. *Not if any have fairly blackened glass at the ends of the tubes. *Replace the tubes. *See what happens. *If one light lights right away, note that tube and mark it somehow. *Switch the good tube with any of the other three tubes. *See what happens when you turn the fisture on. *Does the good tunbe light, or does the replacement tube light. *If the replacement tube lights, the ballast is liekly to be bad.. * IF the good tube still lights, the other tubes is probably bad. Good plan for isolating the failing component, thanks. I did as you suggested. I didn't see anything that looked like corrosion. When I put them back, all 4 lit up like they always have. Maybe something was loose or I knocked off a little dirt. Thanks for the help.- Hide quoted text - - Show quoted text - I have done what I suggested many times. The film on the outside of the tubes can be virtually invisible but still prevent them from starting properly. Pass the word on when someone you know has a similar problem. |
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