How to measure Light and Lux levels

It’s vitally important to know how to measure light & lux levels in the workplace or in your home; bad lighting can be hugely detrimental to your business. Not enough light (or low lux levels) may cause fatigue, muscle strain, and costly mistakes in work, particularly if an employee or colleague is exposed to insufficient lighting over long periods of time. The same is true for excessive light (or lux) levels. Glare and reflected light can distract an individual and impair his or her vision, which is particularly dangerous when a job requires the worker’s full attention,such as working with machinery or hazardous chemicals. A simple calculation has been devised to work out LUX levels.

Lux level = total light output (lumens) / area (square meters)
total light output = lumens per fixture * number of fixtures
 
Kitchen    
  General 300 lux
  Counter top 750 lux
Bedroom (Adult)    
  General 300 lux
  Task 500 lux
Bedroom (Child)    
  General 500 lux
  Task 800 lux
Bathroom    
  General 300 lux
Living Room/Den    
  General 300 lux
  Task 500 lux
Family Room/Home Theater    
  General 300 lux
  Task 500 lux
  TV viewing 150 lux
Laundry/Utility    
  General 200 lux
Dining Room    
  General 200 lux
Hall Landing    
  General 500 lux
Home Office    
  General 500 lux
  Task 800 lux
Workshop    
  General 800 lux
  Task 1100 lux