I want to install an IKEA Calypso ceiling light. The screw holes in my ceiling measure 7 cm across.

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The screw holes on the light differ - they measure 9 cm across. How would I screw in the light if the holes don't match up?

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Here's the manual to my light:

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I noticed that the original lights in my house have both 7 cm and 9 cm separated screw holes, a feature that my new light does not have. Here is an example of an original fluorescent light, which would be easy to install:

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You need to acquire a light fixture mounting bracket. The type that you need would look like the bracket as shown in the picture below:

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Install it through the longer slotted holes into the existing electrical box holes. You can use the screws from the old light fixture.

Due to the deep recess of the electrical box the bracket arm with the long slotted holes will reset against the ceiling drywall. The other arm needs to be oriented so that the ends project down from the ceiling so that there is clearance for the screws from the light fixture to go into the threaded hole but not have to enter the ceiling surface. This picture will help to show the mounting strategy:

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The new fixture then can mount into one of the sets of threaded holes in the other arm of the bracket.

  • I have seen that bracket being sold at the store too. To my understanding, the only mechanism that holds up this bracket to the ceiling and the light to the ceiling is the threading on the screw holes. Is that sufficient or should it be reinforced by nuts over the screws? FYI, the light is 7 lbs (3.1 kg) – JoJo Dec 22 '14 at 16:28
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    Let me answer by pointing out that your old light fixture was mounted with two screws that went into threading in the two tabs on the electrical box. – Michael Karas Dec 22 '14 at 23:23
  • To be more specific for the next person - if the new fixture is heavier than the old it's always worth inspecting the box and making note of where it attaches to studs, and how. Generally, old-construction is good, but some homeowners take shortcuts and might not have installed a box correctly. Fixtures are designed to support 40-50 pounds of static weight, provided the fixture is the correct type and was securely mounted (generally TRUE of construction-time installs, but some homeowner "improvements" are not as stable and should be inspected). – Scott Prive Jan 21 '19 at 20:21

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