Yeelight LED Bulb No "Fade In and Out" effect after update to 1.4.2_0075

I notice a change in the way my Yeelight turn on and off after updating to firmware 1.4.2_0075.
Before update, the brightness of the Yeelight LED bulb will “Fade In” and “Fade Out” when it is turned on or off which is very pleasant to the eyes.

However, after updating to Firmware 1.4.2_0075, the brightness will just increase to max when turn on and reduced to zero when turn off which is very distracting.

Can you revert back the turn on and off brightness behaviour to the previous one. This is really annoying.


Which device do you have and what’s the full version of the firmware?

My device is the "Yeelight LED Bulb (Color)

The firmware is 1.4.2_0075

I updated it recently, and only after update I have this behavior change. Can you revert this change in the next firmware update?


Hi Dingyichen,
Any finding? Thanks

I have tested from our lab, there’s actually no fade in and out effect in latest firmware version. We will take a look at the issue.

Yes, there was a fade in and our effect in the previous firmware. Please help to restore this functionality back. It was more pleasing to have fade in and out. :slight_smile:

Otherwise, can you tell me how to downgrade to the previous firmware version?

Hello, I confirmed that we update firmware to fix the lamp flash blue/red color in some cases, which will effect fade in and fade out.

If you select Mainland china server, please share the bulb to account: 268240019, I will help downgrade firmware.

Hello, It’s good that the firmware update will fix the lamp flashing blue/red issue. However, will the fade in and fade out functionality will be restored in the future firmware?

I have shared 3 of my bulbs (Entrance, Ceiling, and Arstid) to your account. Please help to downgrade to the previously working firmware. Thank you. :slight_smile: Can you let me know after you downgraded the firmware? Thanks.

My Xiaomi account: 1597295805

No, I don’t think so.

Please have a check, your bulb is in version 1.4.2_0070 now. Please note if you want fade in and out effect, please don’t update again.

Hi Dingyichen,
I have 3 bulbs which I shared with you. You only update 1. Can you help to update the other 2 (Entrance and Arstid Light)? I have re-shared it again.Thanks.


Thanks a lot for your help. All changed to previous firmware.
I just hope that the functionality can be restored, or at least not removed in the Yeelight Color LED v2. I have several of them too.

Thank you.

Don’t worry about v2, this only affects bulb v1.