Brightness loss for some RGB colours after latest firmware update (v1 bulb)

Yeelight LED Bulb (Color)
#1

Hi,

After the 1.4.2_0069 firmware update some lighter RGB colours lost a lot of brightness from my v1 bulb. For e.g. I have matched an incandescent bulb with rgb(255,160,70) (16752710 for the set_rgb command) because the 2700K colour temperature wasn’t the best match, however the brightness of the incandescent bulb, the RGB and the CT mode were the same (at 90-100% brightness value in the app). After the firmware update in RGB mode the max. brightness faded to about 60% of the original. In CT mode (2700K) the brightness remained the same.

After the disastrous update I have reset the bulb and re-added in the device list but the brightness loss didn’t change, so it’s in the new firmware.

Regards

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Bright problem after firmware update(1.4.2_0070)
#2

Is it possible to downgrade to the previous working firmware?

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#3

Hi, i cant see 1.4.2_69 update. It says 61 is last one. Are you using beta app?

#4

Hi! I have a similar problem, and I’m not in the beta program, but I got this version.

#5

No, it was a normal update for me. But I would definitely like to roll it back to the previous version :smiley:

#6

Unfortunately nothing has changed with the latest firmware (1.4.2_0070) update. Decreased RGB brightness and colour patches under the bulb’s “skin”.

#7

Is there any news? The same happened to both of my bulbs. On white settings they are fine, but on colored they are very dim. It happened after a firmware update (not app update).