# Turn on lights smoothly in sync (Zigbee groups) **URL:** https://community.homey.app/t/turn-on-lights-smoothly-in-sync-zigbee-groups/110611 **Category:** Questions & Help **Created:** [May 28, 2024, 11:39am UTC](https://community.homey.app/t/turn-on-lights-smoothly-in-sync-zigbee-groups/110611 "2024-05-28T11:39:11Z") **Posts on this page:** 1 **Showing post:** 10
### 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: [April 16, 2025, 6:05pm UTC](https://community.homey.app/t/turn-on-lights-smoothly-in-sync-zigbee-groups/110611/10 "2025-04-16T18:05:33Z")
Hi Patrick, While Homey sends all commands at once (with any protocol, not zigbee in particular), asynchronous, the Group app should send commands to group members one by one, synchronous. That tiny delay in between each command _ **always was** _ present, _and_, in previous app versions, it was adjustable. I couldn’t find that setting either, in the current app version, _with Light groups that is_: I just found out **it’s present in a United group** advanced settings tab: > ![1000046506](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/7/9/79f14071708994aa1c601119abe75512f132b918.jpeg) ### Can you confirm the lights act as expected, when operated one by one? (to rule out any zigbee issues). NB Here I’ve found a screenshot of an previous app version, it definitely was there in any group type one day: > [@Flow dim lights](https://community.homey.app/t/flow-dim-lights/72698/2): > > The group app has a “delay” option, which you can set to 100ms for example. > The delay will be added between the commands to every device in the group; > > ![Screenshot from 2022-11-27 02-22-43](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/7/9/79c4cd1ad24f13392798ee157095b6b381e788da.png) --- _[View the full topic](https://community.homey.app/t/turn-on-lights-smoothly-in-sync-zigbee-groups/110611)._