# Talk:Sunlight

## Luminance and retinal damage

I suggest that "burning glass" retinal damage be included in Effects on human health. It is largely the result of the high luminance of sunlight. This is easily observed in the increase of vision problems after solar eclipses, but it is much more common than that. Luminance is related to the light intensity at the sun's surface, unlike illuminance which is the intensity at the Earth's surface.

An other health effect may be macular degeneration due to cumulative exposure to blue light, but that may be too subtle to include here, at this time.

## Calculating lumens per square meter in summary section

In the summary section, it state's that the direct sunlight at the Earth's surface is 1050 W/m2. It is also stated that sunlight includes the infrared, visible, and ultraviolet bands. The summary section then multiplies 1050 W/m2 by 93 lumens per watt to get a value. However, lumens is a measure that pertains only to visible light; is it appropriate to multiply it by 1050 W/m2 when that value represents more than just visible light? — Preceding unsigned comment added by 70.171.18.164 (talk) 00:19, 2 January 2017 (UTC)

Todd the reversal was not made on 'your' edit, but the one 'after' your edit. There are a number of us chasing this guy: User:Hemant banswal‎ around the site, who keeps changing the opening photos on articles. All I did here was revert him, and warn him to stop. I hope that explains your question. Thanks - Pocketthis (talk) 21:28, 3 January 2017 (UTC)

• P.S. I am in a hurry to make an appointment right now, and am messing up my post to you Toddst1. Perhaps if you go to his talk page and see the countless warnings, with no reply or adherence from him at all, it will explain my "over the top" edit summary. I even left him a friendly advice message this morning, however, this kid keeps on truck'in, and that's that. I may have overdone my edit summary, but at this point I wanted to see if I could jolt some sense into him. Trust me, that is not like any edit summary I have ever left before :-) Pocketthis (talk) 21:56, 3 January 2017 (UTC)
Thanks. I appreciate the response. It sounds like WP:ANI might be in order. Toddst1 (talk) 22:41, 3 January 2017 (UTC)

## direct vs indirect sunlight.

I made an anchor for direct sunlight to redirect here, i note there is also direct insolation and the constrasting concept of diffuse solar radiation (Diffuse sky radiation) which has it's own page. Could there be a subheading here which mentions these contrasting concepts, perhaps MfortyoneA (talk) 18:24, 2 March 2017 (UTC)

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