I would like to trigger evening lights based on light levels in a room, but I can’t seem to find any way of doing so. I currently use cloud coverage from a weather integration as an estimate for overall brightness, but this can be unreliable as it is for the city in general and not specifically at my home.
I donot know how good the Xiaomi is in poor light conditions, my Hue motion/light sensor IS poor, it is fine with higher lux but towards dusk it drops quikly to 1. I built byself on with esphome and a sensor from ali to help, much better…but esphome can be a hurdle too
Here is the 24 hr graphs for the aqara motion sensor in my kitchen and basement laundry room (has a window). they have a built-in lux sensor
As comparison, my Hue. Around 16:00 we had a thunderstorm with heavy rain but you see that it drops to a level which I can only interpret as ‘dark’…which it was not
I’ve thought about the Aqara but it only seems to be available via AliExpress. I would feel better if it were listed on Aqara’s actual site.
Aqara T1 zigbee version is available for me via Aliexpress at 26EUR
If you don’t mind Zwave, Fibaro and NeoCoolcam have good Multisensors with light. Works fine here, both.
DIY:
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These are brilliant. I run them via USB power and they report super quick. Great for light based automation. I use them to trigger lights on motion, only when lux level is too low. All done with the same device.
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Zooz also has multisensor that does brightness sensing:
ZOOZ ZSE40 4-IN-1 SENSOR – ZOOZ (getzooz.com)
ZOOZ ZSE11 Q SENSOR – ZOOZ (getzooz.com)
Those are z-wave options.
Hi I know this is an old 2023 post. I need LUX light sensors for my HA, and options have been posted.
In my case, I am all Wi-Fi and have no need for Zigbee or Zwave for my devices to work. However, I do have an Aqara hub for the Aqara motion sensors.
What is a good recommendation if you do not use Zigbee or ZWave? Thx
Thx…does not need to be cheap. I want something out of the box. I can set up. All I need is one to measure LUX.
aqara P1 have light-sensor
The P1 only reports Lux values when motion is detected OR every 55th minute which renders it pretty useless if Lux measuring only is what you’re after.
I am looking for something similar myself but already ruled out Hue Outdoor Sensor (expensive and unreliable), Aqara T1 (not sold anymore) and Aqara P1 (above reasons).
Anyone have anything else in mind? 
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I was recently looking for the same and decided to get this so I can play around with the mmwave motion sensor as well. So far it seems to be working well, but just a few days into using it. Super easy HA integration if you already have ESPHome setup. I was going to build my own, but this seemed like a much easier route and you can even print the case/accessories with your own 3d printer.
These bluetooth motion sensors have a lux sensor and are buy 2 get 1 free today. Not sure how long battery will last in beacon mode, but going to give it a try.
https://www.shelly.com/en-us/products/shop/shelly-blu-motion
After new user discount and the free one, about $11 each shipped for 3.
Also shelly blu door&window has lux sensor (and reed swich and tilt angle sensor).