GPU render brighter images Than CPU

If you can share the scene with the developers, you’d better report the problem. Later developers will decide whether or not this is a bug, but it is always better to report just in case.
I think that the size of the lamp should not influence between CPU and GPU result. Perhaps with larger lamps the problem remains, but it just happens that it is not noticeable.

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You can use this .blend file in the report, it is reproducible:
CPU-GPU differences with small Area Lamp.blend (109.2 KB)

Edit:
Wait, apparently this is reported:

You can add a comment to that entry that you are affected by that problem

Edit 2:
Ok, I saw your report. No problem, I have made a comment there.
Thank you for reporting it.

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