# Fibaro sun sensor not registering lux well

**URL:** https://community.homey.app/t/fibaro-sun-sensor-not-registering-lux-well/156303
**Category:** Questions & Help
**Created:** [June 18, 2026, 1:16pm UTC](https://community.homey.app/t/fibaro-sun-sensor-not-registering-lux-well/156303 "2026-06-18T13:16:49Z")
**Posts on this page:** 2
**Page:** 2

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### Author: ![CasduPree](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/casdupree/32/109737_2.png) [@CasduPree](https://community.homey.app/u/CasduPree)
#### Post date: [June 19, 2026, 2:57pm UTC](https://community.homey.app/t/fibaro-sun-sensor-not-registering-lux-well/156303/21 "2026-06-19T14:57:38Z")

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Thanks. I’ll check it out tomorrow, and disable flows if it happens again to monitor again. Then try your app.

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<div class="post-metadata">

### Author: ![CasduPree](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/casdupree/32/109737_2.png) [@CasduPree](https://community.homey.app/u/CasduPree)
#### Post date: [June 23, 2026, 1:29pm UTC](https://community.homey.app/t/fibaro-sun-sensor-not-registering-lux-well/156303/22 "2026-06-23T13:29:41Z")

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Thanks for helping out. I couldn’t figure out how to use your app, but… I did find out the possible problem. I think the Fibaro might have a cap on how long it can be 12.000 lux. 2 minutes at that minimum lux was probably too long and therefore shut down to 0.

I wanted to keep trying and since I adjusted my flow to: Close sunsreen when the lux is higher than 12.000 lux for 30 seconds, it works!

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