We can devide and examine lightning issue into two saparete parts.
- Lighting Quality
- Light Color
- Ability to See Colors
- Glare/Design (Impacts People & Productivity)
- Technology
- Design
- Maintenance
![](https://steemitimages.com/640x0/https://ichef.bbci.co.uk/news/660/cpsprodpb/C01B/production/_90897194_lightbulb.jpg)
We have two main indicators about lightning qyality:
Color Rendering Index (CRI)
Indicates the effect on the color appearance of objects illuminated by the light source.
90 – 100 CRI = Excellent color rendition
75 - 85 CRI = Good color rendition
55 – 70 CRI = Fair color rendition
0 – 55 CRI = Poor color rendition
![](https://steemitimages.com/640x0/http://www.tormin.com.tr/wp-content/uploads/2017/01/Screen-Shot-2014-10-15-at-1.37.08-PM.png)
Correlated Color Temperature (CCT)
The color appearance of light emitted from a light
< 3200K = “warm” or red side of spectrum
> 4000K = “cool” or blue side of spectrum
![](https://steemitimages.com/640x0/http://blog.ledlightscanada.ca/wp-content/uploads/2017/11/Kelvin-Chart.jpg)
Also we have some consideration point. These can be sorted like below:
- Uniformity
- Color rendering index
- Color temperature
- Glare
- Light source selection
Please keep on track for my next posts...
Posted from my blog with SteemPress : http://steemblog.online/?p=170