04-18-2011, 03:32 PM | #21 |
Join Date: Feb 2005
Location: Berkeley, CA
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Re: Light Levels
That's not really surprising; there simply aren't that many ways to do proper curve fitting on the available data points (it's certainly possible that some one of the authors was aware of my page, it's been around for a while, but spontaneously coming up with similar numbers is quite believable).
Last edited by Anthony; 04-18-2011 at 03:35 PM. |
04-18-2011, 05:13 PM | #22 | |
Doctor of GURPS Ballistics
Join Date: Sep 2004
Location: Lakeville, MN
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Re: Light Levels
Quote:
I remember the numbers being SO obviously a nice curve fit that I simply didn't go any farther than that.
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04-18-2011, 05:16 PM | #23 |
Join Date: Oct 2008
Location: Shangri-La
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Re: Light Levels
Here's the table from Mysteries, combined with the one from Magic ... overall it gives a pretty good idea of the various light levels.
Modifier .... Light Level +0 to -1 ... Overcast day -1 to -2 ... Indoors with warehouse lighting, emergency lights, and other poorly-lit spaces -2 to -3 ... Twilight or overhead streetlights -3 ........... Torchlight -3 to -4 ... Clear night, full moon -5 ........... Candlelight or moonlight -5 to -6 ... Overcast night with moonlight -7 ........... Starlight -9 ........... Clear night, no moon |
04-18-2011, 05:23 PM | #24 |
Join Date: Feb 2005
Location: Berkeley, CA
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Re: Light Levels
It's a bit of work deciding where -1 should go, I set it at below 500 lux because that's the minimum for an indoor sports arena and it worked with the rest of my formulas, but given that full sunlight is on the order of 100,000 lux, it's certainly possible to set it higher. I just liked 'x10 distance to light source = -3 light level'.
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04-18-2011, 06:38 PM | #25 |
Join Date: Mar 2010
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Re: Light Levels
Information! Wee! Much obliged.
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04-18-2011, 07:16 PM | #26 |
Doctor of GURPS Ballistics
Join Date: Sep 2004
Location: Lakeville, MN
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Re: Light Levels
Are you sure this one isn't "overcast night, no moon." I'm pretty sure I dimly remember that being the darkest possibility other than "buried in a cave."
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My blog:Gaming Ballistic, LLC My Store: Gaming Ballistic on Shopify My Patreon: Gaming Ballistic on Patreon |
04-18-2011, 07:29 PM | #27 |
Join Date: Oct 2008
Location: Shangri-La
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Re: Light Levels
That's what the table in Mysteries says, although I'd tend to agree with you: "clear night" implies starlight, which is listed in Magic as -7. I suspect it's a typo.
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04-18-2011, 08:25 PM | #28 |
Join Date: Jul 2006
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Re: Light Levels
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Tags |
rev. pee kitty, rules |
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