Calculators

Luminous Calculator
Bowman-Sapolinski Equation

 

Luminance Contrast Testing Bowman-Sapolinski EquationThe Luminous calculator is to be used where the LRV’s are know. For example two (2) paint colours from a Dulux colour fan deck. The LRV’s for each colour are found in the rear of the fan deck. Please note that these LRV’s are Spectural Component Inclusive, which means that the finish will effect the actual perceived contrasts.

This calculator can be used for Photometer measurements of TGSI’s however if testing building elements with a photometer, the Luminance calculator below must be used to determine the luminance contrast ratio.

Click on the image to the right to use the Luminous Calculator – please note that Luminos Consulting do not accept any responsibilities for the accuracy of the results as the LRV’s were not obtained by our testing procedures or the miss-use of this calculator.

The Luminance contrast ratio will be calculated automatically when the two (2) LRV’s are entered into the cells. To calculate other LRV’s simply just enter the values into the cells.

Use the Luminous Calculator

 

 

Luminance Calculator

Use for cd/m2 – AS1428.1 – On-site Testing

 

Luminance Contrast Site InspectionsOnsite luminance contrast testing is performed using as per the equipment stated in AS1428.1 & AS1428.4.1 a single reflex lens photometer which will give a measurement in cd/m2. This calculator is ONLY suitable for Photometer values for building elements. Do NOT use this calculator for Photometer measurements of TGSI’s – use the above Luminous calculator.

Click on the image to the right to use the Luminance Calculator – please note that Luminos Consulting do not accept any responsibilities for the accuracy of the results as the cd/m2 measurements were not obtained by our testing procedures or the miss-use of this calculator.

The Luminance contrast ratio will be calculated automatically when the two (2) cd/m2 measurements are entered into the cells. To calculate other cd/m2 measurements simply just enter the values into the cells.

Use the Luminance Calculator

 

Luminance Contrast Examples

In Australia there are approximately 300,000 people who are either blind or vision impaired and this number is rapidly increasing with one person being diagnosed with a vision impairment.

 

Luminance-Contrast-Paint

 

No.    Colour                     Luminance Contrast %
1         Opus 64                     0.9
2         Opus Half 71             4.7
3         Opus Quarter 78      9.7
4         Breezy 61                  13
5         Breezy Half 69          6.6
6         Breezy Quarter 76   1.4
7         Enchantress 9           77.1
8         Charred Clay 14       68.4
9         Butter Ridge 76        1.4
10       Bee Hall 63                1.7
11        Capitol Yellow 54     9.6

 

Luminance-Contrasting-Testing-Paint

Contrasting with central base colour, Dulux Lamarque: LRV 89
No.  Colour                            Luminance Contrast %
12     Apple Slice 85                 2.6
13     Apple Slice Half 88        0.7
14     Apple Slice Quarter 90  0.7
15     Water Worn 33               47.7
16     Accord 45                       34.6
17     Grey Pail 56                   24.3
18     Red Terra 16                 70.2
19     Dandelion Yellow 67     15.2
20     Dewpoint 77                   7.9
21     Dewpoint Half 70           13
22     Dewpoint Quarter 62    19.2