Hue Illuminance differences

Can anyone explain why my 2 hue outdoor sensors aren't using the same scale for illuminance and how to fix this.

There arent using two different scales, if i had to guess id say one of them isnt updating...

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Here they are on the dashboard. They are so vastly different. I thought I remember reading once about illuminance vs lux measurement.

The hi one is in a window sil facing out. There others are indoor. It's the sun really blasting that sensor that hard? Maybe the glass is magnifying? I don't know what to think.

Yes! I have several of the devices and 10K is not at all surprising for an outside facing one. I think I've seen as high as 30k but don't quote me on that.

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Indoor lux levels are going to be much lower than anything you have facing outdoors. If you think there's a reporting problem, you'll need to put them in the same spot to have a fair comparison. Otherwise, this seems fine to me.

Lux is a unit, and illuminance is a generic term for what you're measuring. "Lux" is to "illuminance" as "degrees Fahrenheit" is to "temperature."


Thanks everyone. I gotta say this makes me look very differently at sun block. If I can see perfectly fine at 200 lux wth is 100k+ doing to us?

Sunblock. I humbly advise you sir, to look up the ingredients' MSDS sheets before you slather them all over your body.

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Lol probably, but it seems better than being baked by something that's apparently 1000x the power of my LivingRoom lights.

A Material Safety Data Sheet is meant to inform someone that is handling a hazardous or potentially hazardous substance in a workplace about the risks of occupational exposure, and usually how to contain and clean up that substance.

It's probably of minimal value to a consumer that uses a commercially available skincare product that contains a much lower concentration of a substance that has an SDS (MSDS is actually an outdated term), if one is concerned about the risks of exposure to the compound in question over their lifetime use of that skincare product.

That's not to say that there aren't potentially legitimate concerns about chemicals found in sunscreens that can be absorbed through the skin. But that's not a question a Safety Data Sheet can answer.

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A side note on this sensor. It is 14f outside today and that window sil measured over 90f today during peak brightness. Also watching this thing today I can actually track cloud cover pretty what useless things can I automate with that info.

I automate the level of my kitchen lights. :wink:

Oh wow, are your lights that finely tuned that they come on or turn up if a cloud passes over? If so you win Home Automation today...Congrats :slight_smile:

Not quite that finely tuned! haha

Every 10 minutes during the day, I take an average of inside and outside illumination. I use the average in a rule that sets a percentage variable based on lux ranges. When the variable changes, the kitchen lights — and some other lights around the house — are set to that percentage. A passing cloud won't really change the level. But if it sticks around for more than 10 minutes it might.

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