# Which LightSensor to trust

**URL:** <https://community.homey.app/t/which-lightsensor-to-trust/10913>\
**Category:** Questions & Help\
**Created:** [March 22, 2019, 9:48am UTC](https://community.homey.app/t/which-lightsensor-to-trust/10913 "2019-03-22T09:48:50Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Twan\_Veugelers](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/twan_veugelers/32/129333_2.png) [@Twan\_Veugelers](https://community.homey.app/u/Twan_Veugelers)\
**Post date:** [March 22, 2019, 9:48am UTC](https://community.homey.app/t/which-lightsensor-to-trust/10913/1 "2019-03-22T09:48:50Z")

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Hi.

I now have 2 light sensors next to each other, both ‘looking’ in the same direction.

 ![Helderheid](https://us1.discourse-cdn.com/flex025/uploads/athom/original/2X/0/0956f933330c9a4bfb4935d155a83301bb772a31.jpeg)

The top one is the Aeon Multisensor 6, the bottom one is the Fibaro MultiSensor (Eye).  
There is a significant difference in the numbers of lux that are measured.

Which one should I trust?

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**Author:** ![danone](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/danone/32/115743_2.png) [@danone](https://community.homey.app/u/danone)\
**Post date:** [March 22, 2019, 11:43am UTC](https://community.homey.app/t/which-lightsensor-to-trust/10913/2 "2019-03-22T11:43:49Z")

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That is a big difference, indeed. Other than just getting different opinions here, maybe you should borrow a photometer.

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**Author:** ![Twan\_Veugelers](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/twan_veugelers/32/129333_2.png) [@Twan\_Veugelers](https://community.homey.app/u/Twan_Veugelers)\
**Post date:** [March 22, 2019, 11:48am UTC](https://community.homey.app/t/which-lightsensor-to-trust/10913/3 "2019-03-22T11:48:15Z")

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I was thinking the same thing…  
Let’s see if there are some real photographers within my ring of friends…

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**Author:** ![Jamie](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jamie/32/5274_2.png) [@Jamie](https://community.homey.app/u/Jamie)\
**Post date:** [March 26, 2019, 1:17am UTC](https://community.homey.app/t/which-lightsensor-to-trust/10913/4 "2019-03-26T01:17:05Z")

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Odd that they both are so similar. Once you figure out which one is ‘right’ hopefully its just a math error and the other can easily be fixed.

I would warn about buying a third smart home device to figure out which one is correct. Thats how I ended up with 4 brands of thermometer in my Lounge, none of which are the same.

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**Author:** ![Twan\_Veugelers](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/twan_veugelers/32/129333_2.png) [@Twan\_Veugelers](https://community.homey.app/u/Twan_Veugelers)\
**Post date:** [March 26, 2019, 4:21pm UTC](https://community.homey.app/t/which-lightsensor-to-trust/10913/5 "2019-03-26T16:21:02Z")

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> [@Jamie](#):
>
> Thats how I ended up with 4 brands of thermometer in my Lounge, none of which are the same.

That is not something I plan to do… 😏