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Re: Next step for DAP Ambient Light Events

From: Doug Turner <doug.turner@gmail.com>
Date: Thu, 13 Sep 2012 11:03:25 -0700
Message-ID: <CAHni0v-V9R2ifke8Yo1MQu_nMUUZApcOnRfMop9xjRTPXg+H0A@mail.gmail.com>
To: "Tab Atkins Jr." <jackalmage@gmail.com>
Cc: "fremycompany_pub@yahoo.com" <fremycompany_pub@yahoo.com>, "SULLIVAN, BRYAN L" <bs3131@att.com>, Dzung D Tran <dzung.d.tran@intel.com>, François Remy (pub) <fremycompany_pub@yahoo.fr>, Marcos Caceres <w3c@marcosc.com>, Doug Turner <dougt@mozilla.com>, CSS WG <www-style@w3.org>, "public-device-apis@w3.org" <public-device-apis@w3.org>
On Thu, Sep 13, 2012 at 10:23 AM, Tab Atkins Jr. <jackalmage@gmail.com> wrote:
> On Thu, Sep 13, 2012 at 10:12 AM, fremycompany_pub@yahoo.com
> <fremycompany_pub@yahoo.com> wrote:
>> Would you really want to change the site color’s scheme to high contrast
>> black and white at only 1000 lux? If Microsoft data are to be believed, I
>> would set the threshold between 10 000 and 100 000, depending of the screen
>> brightness and reflectance.
>> What do you think?
> Yes, 1000 lux is far too little.
> "bright" is supposed to mean "direct sunlight, or similarly bright
> conditions that make it hard to see things that aren't high-contrast".
>  Based on Wikipedia's lux table <http://en.wikipedia.org/wiki/Lux>,
> I'd set "bright" to start around 10k lux.
> Similarly, "dim" is supposed to mean "dark enough that the light
> produced by a white background is eye-straining or distracting", so
> 300 is far too high (given that it's roughly office lighting).  I'd
> have it start at 50 lux or so.
> ~TJ

Okay.  Sounds fair.

Shall we keep these up to the UA, and put the suggested ranges in
non-normalized text?

Received on Thursday, 13 September 2012 18:04:00 UTC

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