Facade lighting scheme

Dear Reader,



This is one of my façade lighting project. The building is an IT office with edgy design thus the feature can be highlighted by simply highlighting the edges.









Waiting for the project to be get completed. Will share the pics when its completed :) .

What is Color Rendering Index (CRI)?

Color Rendering Index (CRI) 

Lets break it down first 

Color : We all know what that 'color' means.

Rendering : "process (an outline image) using colour and shading in order to make it appear solid and three-dimensional" - Google definition.

Index : "a sign or measure of something" - Google definition.

In lighting linguistics, CRI translates as the ability of the light source to bring out the colours of the object when the light falls on it. This parameter is measured in reference to rendering of the colors under the effect of the natural lights or under the sunlight.

Interpretation of CRI values:

CRI 90 - The colors will be as good as 90% when placed under sunlight. - (good)

CRI 85 - The colors will be as good as 85% when placed under sunlight. - (average)

CRI 70 - The colors will be as good as 70% when placed under sunlight. - (poor)

The higher the CRI, the better.

CRI is a crucial when it comes to indoor lighting. It really enhances the overall appearance of area or that particular painting which you want to stand out or that expensive carpet on the floor or that table meant for banquets.  

An easy experiment to understand the difference:

Just open the palm of your hand on a broad daylight and pay attention to the blood vessels and the veins. Repeat the same under artificial light of CRI 90 then gradually down to CRI 70. One can see how these minute colors of blood vessel and veins become less & less prominent to the point one really has to look t it with more attention to see the difference. 

So if there is an expensive painting say for example 'Mona Lisa' , with lots of different shades of all the colors known to "man" kind, will certainly look flat and bland. The missing colour details would strip the artwork of its magic and charm. 

Therefore higher the CRI the better. Select the lamps with higher CRI for important indoor  area or for a particular task of highlighting / focussing.