Class 3 Flashcards
What are the illuminating engineering society (IES) standards?
Set the general lighting recommendations on how much light should fall on each object or surface in order to achieve satisfactory lighting conditions
It applies to the quality of light, its perception (brightness/contrast=foot candle) and color quality (CRI)
What is general lighting? What is its foot candle
Lights up the general space
Up to 20 fc
What is accent lighting? What is its footcandle
Attributes accents to certain areas
30-50 fc
What is task lighting? What is its foot candle ?
Meant for surfaces where tasks are done- to give better perception
50 or more fc
What is the reason for needing more light to do certain things as we age
Our lens on our retina gets thicker and so reduces the amount of light captured
Also, our pupil size gets smaller with age, which causes even less light to enter
What is ergonomics is lighting?
Proper lighting in spaces can prevent accidents, enhance productivity and quality of work, prevent eye fatigue and headaches
What are common lighting problems?
-Insufficient lighting
-poor light distribution
-glare
-improper contrast
-light flickering
-blue light exposure
-light sensitivity
Things to take into account with light distribution and balance and how it can cause downsides
With badly positioned fixtures, it can cause dark spots or a fluctuation in light.
-choose lights that expel light evenly instead of straight down for general lights
-avoid obstructions between light fixtures and the work stations
-use light color paint in task oriented spaces
What is the downside of glare.
What is direct glare and reflected glare?
Can cause visual discomfort and decrease a persons ability to see.
Direct glare is cause by bright lights from poorly positioned light fixtures or daylight went wrong though windows and skylights. The source may be from direct view of the sun or clouds or from reflections from buildings.
Reflected flare can be cause by light reflecting off computer screens, shiny desk surfaces and windows
What is contrast and its characteristics
The difference in color between an object and its background
Too little contrast makes it hard to read or see
Too much can cause eye strain
How can light flickering be negative and how can it occur
Can cause headaches and eye statins/discomfort for some individuals
It can occur due to:
-The lamp source
-the age of the lamp
-electrical malfunctions
-improper setup
Blue light and its pros and cons
Exposure to artificial blue light during the day can strengthen the circadian timing and promote positive health effects
Being exposed to it at night maybe cause sleep disturbances or other negative effects
How does light sensitivity affect others
In individuals can be triggered by any type of light source, such as including LED, fluorescent and even natural light
The main factors that can affect this are the brightness, the flickering and color of the light
