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 on: Today at 10:42:54 am 
Started by Eric Myrvaagnes - Last post by John R
Bravo, John!

reminds me that the summer olympics are right around the corner !

Thanks guys!


 on: Today at 10:22:57 am 
Started by Harry Lime - Last post by Harry Lime
A quick search of the internet yields this information.

Unsurprisingly there are guidelines and standards for illumination levels in buildings. And 300-500 lux is the recommended light level for exhibit spaces. It is also a common light level for general interiors.

My point is that it doesn't seem to make a lot of sense to review your print under a light level that is either too low or too high compared to the average encountered in the real world (500 lux, incident reading). Otherwise your print will not really appear as intend to the general public, in your average space.

If you judge your prints at 0200 lux (incident) they may appear too bright at 500 lux  (incident).
If you judge your prints at 1000 lux (incident) they may appear too dark at 500 lux (incident).

If you judge your prints at 0500 lux (incident) then they will probably appear as intended in most commercial spaces, including galleries.

Any thoughts?

Recommended Light Levels by Space

The table below provides recommended light levels from the IESNA Lighting Handbook and LPD levels from the IECC 2021 (using the Space-By-Space Method for calculations). Check your local jurisdiction for other or more stringent requirements. The US General Services Administration provides lighting levels and LPDs for US Government buildings, which can be used as a guide for other types of buildings. The LPD levels should continue to drop with subsequent codes and as LED lighting becomes more energy efficient.

The required light levels are indicated in a range because different tasks, even in the same space, require different amounts of light. In general, low contrast and detailed tasks require more light while high contrast and less detailed tasks require less light.

Please keep in mind that this chart is not comprehensive. The IESNA Lighting Handbook has pages and pages of various categories. If you have a very specific need, we recommend further research.


Cafeteria - Eating   20-30 FC   200-300 lux   0.40
Classroom - General   30-50 FC   300-500 lux   0.71
Conference Room   30-50 FC   300-500 lux   0.97
Corridor - General   5-10 FC   50-100 lux   0.41
Corridor - Hospital   5-10 FC   50-100 lux   0.71
Dormitory - Living Quarters   20-30 FC   200-300 lux   0.50
Exhibit Space (Museum)   30-50 FC   300-500 lux   0.31
Gymnasium - Exercise / Workout   20-30 FC   200-300 lux   0.90
Gymnasium - Sports / Games   30-50 FC   300-500 lux   0.85
Kitchen / Food Prep   30-75 FC   300-750 lux   1.09
Laboratory (Classroom)   50-75 FC   500-750 lux   1.11
Laboratory (Professional)   75-120 FC   750-1200 lux   1.33
Library - Stacks   20-50 FC   200-500 lux   1.18
Library - Reading / Studying   30-50 FC   300-500 lux   0.96
Loading Dock   10-30 FC   100-300 lux   0.88
Lobby - Office/General   20-30 FC   200-300 lux   0.84
Locker Room   10-30 FC   100-300 lux   0.52
Lounge / Breakroom   10-30 FC   100-300 lux   0.59
Mechanical / Electrical Room   20-50 FC   200-500 lux   0.43
Office - Open   30-50 FC   300-500 lux   0.61
Office - Private / Closed   30-50 FC   300-500 lux   0.74
Parking - Interior   5-10 FC   50-100 lux   0.15
Restroom / Toilet   10-30 FC   100-300 lux   0.63
Retail Sales   20-50 FC   200-500 lux   1.05
Stairway   5-10 FC   50-100 lux   0.49
Storage Room - General   5-20 FC   50-200 lux   0.38
Workshop   30-75 FC   300-750 lux   1.26

 on: Today at 10:08:10 am 
Started by Harry Lime - Last post by Harry Lime
Thanks Doug

 on: Today at 10:03:16 am 
Started by Chris Kern - Last post by Alan Klein
J&J vaccine update:

White House writes off Johnson & Johnson vaccine after string of production failures
The chaos has disappointed the Biden team, which once argued that the company’s one-dose vaccine would be central to turning the tide of the pandemic.

 on: Today at 09:50:25 am 
Started by armand - Last post by francois
This thread flew under my radar but considering the superb results, I'm glad to that I found it.

 on: Today at 09:48:48 am 
Started by Leszek Piotrowski - Last post by francois
An old iron in all its beauty…
I like it very much, needless to say!

 on: Today at 09:47:39 am 
Started by armand - Last post by francois
Lonely but so calm!

 on: Today at 09:46:46 am 
Started by Antonio Correia - Last post by francois
Very interesting shot, there's a lot to discover as the the laundry doesn't jump immediately into the viewer's face.

 on: Today at 09:45:03 am 
Started by armand - Last post by kers
So, some parameters in camera are a bit different; with some simple curve they are the same...
here thew Olympus back

 on: Today at 09:44:47 am 
Started by Michael West - Last post by francois
a better crop

Indeed! I like this version best! There's something dynamic in it, as if the boulder was surfing.

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