Bulbs that retain their brightness state when power on/off

Hardware
1

Are there any smart bulbs that stay at the brightness set when the power is turned off? I.e. set brightness to 30% via home assistant, the light is powered off at the wall, then turned on again and it doesn’t reset to 100%.

Although when turning the light on to a new brightness, would there also have to be a delay in order to wait for bulb startup and then send the new brightness command?

I am wondering if there is a workaround for my problem with the shelly dimmer

2

No.
You just set brightness level on the bulb when it turns on.
But using smart bulbs for anything then a lamp is wasting money.
Because smart bulbs need constant power to stay online. You can turn on switch on a lamp to have constant power but if you are using smart bulb with light switch then you have problems.
If anyone turn off light switch there goes your smart bulb off line.

4

Do you have any automations to turn them on at a certain brightness different to what it was before it was turned off?

10

Ignoring the pissing contest…

Are you trying to store the state of the dimmer value and restore it when the globe comes back online?

11

My hue bulbs (hue hub) and ikea zigbee bulbs (zbt/z2m) have always resumed their prior state upon switching on. I don’t remember setting anything specific in that regard.

The hue app does let you set the default power on mode for when power is manually switched off/on, versus switching via HA.

The ikea app may also have that option, but I have never used it, so that is just a guess.

TLDR light state resume has always ‘just worked’ for me.

2 Likes
12

Yes, the idea would be something like

  • Light is on, 8am, HA changes brightness to 100%
  • Person turns power off at wall, bulb goes off
  • Person turns it back on again, bulb goes on still at 100%
  • Power off again
  • At 10PM HA sets night mode at 40%
  • 10:15pm Person turns power on, bulb turns on at 40% (ideally without a flicker, but I would imagine the bulb takes time to be ready to receive that command, and HA will have to keep trying until its received)
13

You’d need hardware that supports it. I’m not sure if hue can do it via the native HA integration with their hub. I can tell you that hue does not allow this through zha or z2m. Maybe @123 can weigh in on how he does that.

IIRC the only hardware that typically supports this is DIY. IMO DIY colors are terrible. If you’re going for just white light (no color), then DIY might get you what you want. Just understand that you won’t be doing this through the native light.turn_on/off features in HA. HA itself does not have service calls that allow you to set these attributes without turning on the light. Meaning, whatever you come up with, it will likely be 100% custom.

14

this is with me normal behavior with most zigbee lights. Even my color ledstrip from hue retains the last color and brightness level. Also all ikea light do this by default.

1 Like