"Energy Saving Tips on Lighting Problems"


Three primary considerations when designing and specifying a lighting system are:

  1. Selection of the most efficient light source possible in order to minimize power costs
    and energy consumption.
  2. Matching the proper lamp type to the intended work task or aesthetic application,
    consistent with color, brightness control and other requirements.
  3. Establishing adequate light levels to maintain productivity, improve security and
    increase safety.


In the tables below is a partial listing of recommended minimum foot-candle levels established by the Illuminating Engineering Society (IES) for various commercial, industrial, institutional and recreational tasks.

Note: Outdoor task or applications or noted by bolder type.

10 footcandles 20 footcandles 30 footcandles
Freight Cars

Service Station Ent. Drive
Football Field
Baseball Outfield


Swimming exhibitions
Loading & Freight Docks
Active Storage yard

Rough Assembly easy seeing
Reading good printed matter
Rest rooms
Ship fabricating

Buildings med. dark surfaces, bright surroundings.
Tennis Tournament

50 foot candles 70 foot candles 100 foot candles
Rough assembly,diffucult seeing
Rough bench&machine work
Bank lobbies
Ordinary Inspection

Buildings: dark surface
bright surroundings

Reading , pen or soft pencil
Intermittent filing
Folding textiles
Reading hard pencil
Active filing
Mail sorting
Medium bench&machine work
Indoor Tennis
Car repairing
Fine painting
Store:merchandise,service areas

Football - major stadium

150 footcandles 200 footcandles 500 footcandles
Bank teller stations
Posting and keypunching
Reading poor reproductions
Detailed drafting
Store merchandise, self serve areas
Sheet metal scribing

League Baseball infield

Fine bench & machine work
Store feature displays
Jewelry&watch manufacturing
Fine automatic machines

If there is anything you would like to add or just have a comment please feel free to email E.T.E. at http://www.elec-toolbox.com/email.htm.

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