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We had a problem,year after year with every bulb we had replaced. My pool contractor would check the electrical current in the switch, in the connections under the plate in the deck, and in the fuse box. He would also check for a current in the bulb everytime. No problem would show up each time but the bulb would never stay lit for more than 30 seconds everytime it was replaced.

It took me five years to get him to remove the light and low and behold, the contacts were rusted.

Hope this helps. Lori

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8y ago
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9y ago

You can not troubleshoot a pool light if the replacement bulb does not light. The problem may be that the fuse is overused and therefore it blew out.

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Q: How do you troubleshoot a pool light if a new replacement bulb does not light?
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A light bulb is set in the bottom of a 3m-deep swimming pool. What is the diameter of the circle of light seen on the water?

As an ordinary light bulb will illuminate the whole pool, not just a circle you must be thinking of a spotlight bulb. The answer will depend on how tightly focused the spotlight is.


A 500 watt pool light pulls how many amps?

To answer this question the voltage of the bulb is needed.


How do you remove the light bulb from the underwater light?

You need to remove the screw that holds the light ring and pull the whole light fixture out of the water and up onto the deck. There should be enough wire wrapped around the back of the light to allow this. Remove the lens, replace the bulb, and reinstall the lens with a new gasket, being careful not to get any water inside the fixture. Wrap the excess wire around the back of the light fixture and replace it in the niche, securing it with the screw. A. I would add: You need to test the GFCI, the wiring of the whole fixture - continuity test. If this is a fairly old fixture - my decision would be to replace the entire assmebly with a new one. If you have no GFCI then would be critical that you add one. And lastly but not least, you should have a pool tech service the light. He will know what to look for and how to correct any situation with your light. If there is something wrong with your light assy. and you do not find it by testing you put yourself and anyone who uses the pool in a great deal of danger if the light should malfunction. The codes specify that anytime you work on a pool light you then need to bring that product to current code. That also includes the main drain grate. Yes if you or a pool tech works on any portion of the pool for repairs the code demands that the main drain be brought to current code requirements. So it is not only a matter of just changing the light bulb and gasket.


How to Replace 120 volt pool light with a 12 volt pool light?

You may not be able to do that. The 12V system will have a larger cord and may not pass thru the exhisting conduit. Call an electricial who knows swimming pool electrical codes.


Why is a bulb most likely to fail when the current is first switched on?

Light bulb filaments glow rather than burn because of the lack of oxygen within the vacuum of the bulb. Over time, the heating and contracting of the filament and the glass surrounding it creates a leak in the base of the bulb causing the vacuum to be lost and allowing oxygen to enter the bulb. It is during the contracting phase, which happens as the bulb cools after being turned off, that eventually the seal is lost. When this happens, oxygen is allowed to enter and the next time the bulb is turned on, the filament, now exposed to the oxygen, burns out.

Related questions

What would cause a short in a pool light?

A bad or old light cord. Water or moisture getting into the light can. I hope you have a GFCI on the system. Call a professional pool tech to troubleshoot and advise. A replacement may be in order.


How do you troubleshoot In ground Pool Lighting?

Remove the bulb, then with a multimeter check if there is curennt flowing through the wires most pool lights are 12v ac. If you have no current then the transfomer is not working or not connected. Check the bulb with a multimeter to ensure continuity, if no continuity then replace light bulb.


A light bulb is set in the bottom of a 3m-deep swimming pool. What is the diameter of the circle of light seen on the water?

As an ordinary light bulb will illuminate the whole pool, not just a circle you must be thinking of a spotlight bulb. The answer will depend on how tightly focused the spotlight is.


A 500 watt pool light pulls how many amps?

To answer this question the voltage of the bulb is needed.


Is a pool spotlight different from a regular outdoor flood light?

yes a pool light is typically a sealed unit. this is to prevent water from entering the light and coming in contact with the electrical components of the light. if water were to enter the light it could damage the light fixture and also trip the light breaker or gfci. in addition in some situations if the light were not installed correctly/electrically protected correctly (with breaker and gfci) could cause a dangerous situation to bathers. to change the light bulb in a pool light fixture the light fixture must be brought above the waters surface and the lense with lense gasket removed bulb changed then lense with lense gasket replaced and the light reinstalled in the light niche in the wall of the pool below the waters surface. you must also use the appropriate bulb for the light fixture. this is not as simple as just picking up a bulb from home depot and threading it in as you would do with an outdoor flood light. light repairs should only be performed by a trained pool professional as it could be dangerous if not done correctly.


Where can you get a replacement strip for your pool?

at the pool store


Can you use a 130 volt swimming pool light bulb in a 120 volt swimming pool socket?

Yes, the 130 volts you read on the bulb is the maximum it will handle. It will work perfectly on a 120 volt circuit and will actually last longer than a standard 120 volt bulb.


Light bulb in swimming pool burns out frequently?

Hire a pool tech to trouble shoot the device. You are either using the wrong bulbs or the light fixture and wireing are old. You also HAVE to have a GFCI added to the system.


How do you change the lite in an in ground pool?

Turn of the breaker to the light. Drain the pool (at least below the light). Unseal the light. Remove and replace the bulb. Re-seal the light (replace the gasket if the mfr recommends this). Turn on the breaker and check the light for function. Fill the pool. Check the light for leaks. Piece of cake, actually. It just takes a while to do. Don't forget to check the pool chemistry after filling it!


Where can a replacement rope be purchased for a power pool cover?

Where can I buy replacement for power pool cover


Where can you purchase a replacement bulb for an American Products Co of Los Angeles California 3915 underwater light fixture?

Allen I found the bulb and fixture parts list @poolcenter.com. Be prepared the bulbs are expensive American pool light use a regular 400w flood lamp that can be bought at any home center Answer:: Try Pentair on Google for an absolute answer to finding and using the proper spec bulb. Those bulbs found in home centers etc. may not meet the manufacturer's or code requirements of swimming pool light fixtures. And be sure to always replace the gasket with the exact part required for that specific fixture. Remember, water and electricity do not mix. K


Does the gasket for a pool light fixture also hold the housing ring on?

The housing ring, depending on brand, will hold the gasket. Some lights are assembled with a housing ring and screws others have a clamp type ring. There are several types manufactured. Remember to always replace the gasket with a new one when replacing the bulb etc. Ken