Yeelight RGB Bulb V2

can we get a link? i couldn’t find it unless it scheduled to launch soon for 11.11?

The product is passing certification for FCC/CE and “work with alexa”, will release it to market once all these passed.

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  • Is this V2 bulb have memory, so it remember the last settings when turned off from wall switch (power being cut off from the source)?
  • What is standby power consumption for this bulb?

Are you blind?

10W- 800 lumen.

Do you know what StandBy is?

He was asking for the power consumption when the bulb is switched of. The V1 consumes ~1.2W, which is not low compared to ZigBee based bulbs (~0.4W).

1.2W standby will generate ~10.5Kwh/year.

I’m also interested, whether V2 could be optimized. But I believe due to WIFI connection, it’s probably difficult to get better in terms of standby power consumption.

Any official information on that?

Every bulb has a internal FLASH that can be used to save settings.
The standby power of this bulb is around 0.5w (we put a lot of efforts on reducing standby power to pass the EU energy star requirement), compared to latest generation bulb (around 1w standby power), it improves a lot.

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That’s really great news. And you can and should really use it for further marketing.
Standby consumption was at least for me the biggest drawback in comparison to Philips HUE. :thumbsup:

Great work on reducing standby power consumption!

About flash memory, is Yeelight V1 have this as well, or only V2 has it?

So all V2 bulb will remember last settings when power is cut off completely?
Fot example: If I set color temperature to 6500k and turn the light off by cutting off the power (switch off from wall switch), will it turn on at 6500k? Currently all your bulb and ceiling light will be reset and defaulted to approx 4500k.

For me, this is very important feature and major drawback on existing Yeelight product. Your competitor (Xiaomi Mijia/Philips ceiling light) have this feature.
I’m still waiting for Yeelight to have this feature because of Google Home/Alexa support and higher color temp on Yeelight vs Mijia/Philips ( 6500k vs only 5000k).

Since you said all bulb have Flash memory, it will cost none in term of extra component. Please enable this feature.

The state saving feature is there since day-1 of all our products, you have to turn it on through App. Check “auto state saving” option.

Following is a very basic explanation from technical perspective.

The main reason we make this feature disabled by default is that it will accelerate the dying of FLASH. As you know, FLASH has an erasing limit, once reach the limit, the page of the FLASH will become unusable. Basically, every time you write data to it, you need to erase the page firstly (if it’s not been erased yet). This means every time you adjust your bulb’s color/brightness, you need to erase it. If you change your bulb very frequently everyday, the bulb could be died before its claimed lifetime (normally ~ 10 years).

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Thank you for the explanation, I know there is inherent limit with how many times the FLASH is written before they are dead.
What I didn’t know is all your product indeed have this save state functionality, so thanks again for letting me know that this function exist.

Is this function will save any state such as brightness level, or only color state, or both?

Maybe it is beneficial to enable more granularity on what state it will save, so it will only write certain setting to flash and preserve FLASH longevity?
Maybe you can put 2 save setting state toggle switch (such as Save Brightness State and Save Color State), instead of only 1 toggle switch like now?

For example, I only need to set and save the Color state (in my case 2700k or 6500k) twice every year (warmer for winter month, and colder in summer month).
I don’t need to save their brightness level every time it is turned off via wall switch.
This way, I can preserve precious write limit on the FLASH chip by not writing to it unnecessarily everytime I change brightness level.

Hope you can consider this improvement. Thanks for all your great work, your great work and support is the reason why I only want to buy Xiaomi Yeelight instead of Xiaomi Mijia!

Our write back policy has considered the lifetime factor, basically after you enable the auto state saving option:

  1. When you turn on/turn off the bulb, save the change immediately.
  2. When you change color/CT/brightness, start a timer (30s), when the timer fired, write back the changes.
  3. If another change happened during the 30s window, restarted the timer.
  4. All necessary properties will be written back to FLASH and the file system has a write balance.
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Thank you for the insight on how the auto state saving works.
It will be even better if you separate auto state saving into 2 toggle switch in the app, which can be called Auto Saving Last Color/CT state and Auto Saving Last Brightness state.

The mechanism can still be the same as above, but Color/CT and Brightness state are now separate. We can still enable both if needed.

Is this possible? Or it actually need significant re-engineering?

We will discuss it internally

Thank you for considering this feature improvement, really appreciate it.

any progress with the approval? i am wondering if we can make it for Christmas

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will there be a v2 version of the light stripe aswell?

Yes, extendable version, up to 10 meters.

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Is there a time frame, and is it possible to add connectors for separation points like between cabinets?

Oh my god finally! Love you guys i hope the gen 2 can compete in terms of color production with LIFX, the red looks like an orange and its kinda odd on the first strip

I haven’t seen an issue with red with my yeelight striplight