# Brightness randomly changes

**URL:** <https://community.homey.app/t/brightness-randomly-changes/37030>\
**Category:** Questions & Help\
**Created:** [November 6, 2020, 9:45pm UTC](https://community.homey.app/t/brightness-randomly-changes/37030 "2020-11-06T21:45:20Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![JasperVR](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jaspervr/32/9009_2.png) [@JasperVR](https://community.homey.app/u/JasperVR)\
**Post date:** [November 6, 2020, 9:45pm UTC](https://community.homey.app/t/brightness-randomly-changes/37030/1 "2020-11-06T21:45:20Z")

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Since a few weeks I am experiencing strange behaviour of my led lights. I have 2 sets of 4 led lights in my livingroom, both driven by Fibaro Dimmer 2 modules. The brightness randomly changes as you can see in the attached graph. As for as I can see there is no flow that could be responsible for this. I have 1 flow to enable the lights at sunset and 1 flow to disable the lights at 23:30h.

Is there someway to inspect or monitor what causes the brightness change?

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/8/a/8ac508f05db4a19cc55839585e7ecc4d52de0e6e.jpeg)