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One lamp socket in a newly installed chandelier lights up the bulb a split second after the others. I changed bulbs to make sure that wasn't the problem.

Why is this happening and should the chandelier be replaced?

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are these incandescent or CFL bulbs? – bib Nov 9 '13 at 18:05
Yes, CFL, and the box said it was OK to use them. – Jez Nov 10 '13 at 1:40
I think you need to ensure its not the bulb (this would be normal). Take a bulb that turns on instantly and place it in the socket where you have the problem - does it turn on instantly or is there now a delay? – Steven Nov 10 '13 at 18:29

Your chandelier uses compact fluorescent lamp (CFL) bulbs. Unlike conventional incandescent bulbs, these devices have internal circuitry that causes the bulb to light. CFL bulbs have been noted to take some time to come on and to reach normal brightness as the circuitry reaches full activity.

More recent versions of these bulbs have improved and are often advertised as instant on. However, there may still be a slight delay. This is normal. If you swap the delaying bulb into a different socket, it is likely that the new socket will now show the slight delay.

If you try other bulbs (or other brands), you may be able to find ones that come on simultaneously.

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