# What's the best way to group lights and dim them over time?

**URL:** <https://community.homey.app/t/whats-the-best-way-to-group-lights-and-dim-them-over-time/147427>\
**Category:** Questions & Help\
**Created:** [December 20, 2025, 3:42pm UTC](https://community.homey.app/t/whats-the-best-way-to-group-lights-and-dim-them-over-time/147427 "2025-12-20T15:42:01Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ehm](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/ehm/32/17735_2.png) [@ehm](https://community.homey.app/u/ehm)\
**Post date:** [December 20, 2025, 3:42pm UTC](https://community.homey.app/t/whats-the-best-way-to-group-lights-and-dim-them-over-time/147427/1 "2025-12-20T15:42:01Z")

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Hello fellow users.

I currently have many advanced flows where I individually dim my (Hue and non-Hue) lights to a specific value over time. However, I would like to simplify these and have the lights as groups instead.

Is there an app or built in functionality that allows me to tell a group of lights to dim to a temperature or value over time? I am open to a scripting option as well, if that’s the best way.

The most important thing for me and my usage to have the dimming happening over time and not immediately.

Thanks!

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**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\
**Post date:** [December 20, 2025, 7:04pm UTC](https://community.homey.app/t/whats-the-best-way-to-group-lights-and-dim-them-over-time/147427/3 "2025-12-20T19:04:36Z")

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You might like to try the \< group \> app.  
Only when all group members have the “Duration” option\[1\], the group device should have it as well (can’t test myself);  
Then it can be as simple as:

 ![Screenshot_20251220_195312_Firefox](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/f/a/fa2b071e53f4e499d00a2e332e0986aadf29b2cb.jpeg)  
 ![Screenshot_20251220_195239_Firefox](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/a/2/a289f57de9f0ad0567d32de40963dbaf93bd3953.jpeg)  
¹) _Unfortunately it’s not a default option for any light. I know Hue and Ikea lights have this option available_

#### Alternative

Dimming over time can also be done by using a Transition for example

> [@The Flow Exchange(r) - Exchange Your Flows with Others!](https://community.homey.app/t/the-flow-exchange-r-exchange-your-flows-with-others/68981/47):
>
> When you want, say, a light / lights to gradually dim up/down to a certain level over a longer period of time.  
> Like a wake-up light, or sleep-in light.
> 
> ![Screenshot from 2022-12-19 05-08-03](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/0/c/0cdd8f692b8b0e929a302d80af2744945b21fa78.png)
> 
> ### Apps used:
> 
> - [Chronograph](https://homey.app/a/nl.fellownet.chronograph)

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1. Footnotes

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<div class="post-metadata">

**Author:** ![ehm](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/ehm/32/17735_2.png) [@ehm](https://community.homey.app/u/ehm)\
**Post date:** [January 2, 2026, 5:50pm UTC](https://community.homey.app/t/whats-the-best-way-to-group-lights-and-dim-them-over-time/147427/4 "2026-01-02T17:50:57Z")

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Hi Peter. Thank you for a thorough response, and apologies for me not seeing it earlier.  
What you answered is what I hoped was the answer. This would make everything very easy.

I just now used \< group \> and added three hue GU10 bulbs to a light group, I then took a then-card with “dim to” in my advanced flow and checked if there is a duration option, unfortunately not:

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/3/2/32546881df6d3c6cb8dee95b3f3a983b87ab0e25.png)

However, all of the lights within this group have the ability to add duration.

I also tried different Hue bulbs, and I tried creating a unified group. No luck!

Do you know what I’m doing wrong, or if I have to enable it somehow?

Thank you for your time 🙂

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**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\
**Post date:** [January 3, 2026, 12:53am UTC](https://community.homey.app/t/whats-the-best-way-to-group-lights-and-dim-them-over-time/147427/5 "2026-01-03T00:53:53Z")

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YW!  
About the duration you’d best ask the developer by posting in the \< group \> app topic. You’ll find it on the app page at the homey.app store.