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Electricians' toolbox
Energy Saving Tips
Three primary considerations when designing and specifying
a lighting system are:
- Selection of the most efficient light sorce possible in
order to minimize power costs and energy consumption.
- Matching the proper lamp type to the intended work task
or aesthetic application, consistent with color, brightness
control and other requirements.
- Establishing adequate light levels to maintian productivity,
improve security and increase safety.
In the tables below is a partial listing of recommended minimum
footcandle levels established by the Illuminating Engineering
Society (IES) for various commercial, industrial, institutional
and recreational tasks.
| 10 footcandles |
20 footcandles |
30 footcandles |
- Concourses
- Freight Cars
- Service Station Ent. Drive
- Football Field
- Baseball Outfield
|
- Corridors
- Stairways
- Elevators
- Swimming exhibitions
- Loading & Freight Docks
- Active Storage yard
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- 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
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- Reading hard pencil
- Active filing
- Mail sorting
- Medium bench&machine work
- Indoor Tennis
- Car repairing
- Fine painting
- Store:merchandise,service areas
- Football - major stadium
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| 150 footcandles |
200 footcandles |
500 footcandles |
- Bookkeeping
- Accounting
- Bank teller stations
- Posting and keypunching
- Reading poor reproductions
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- Detailed drafting
- Store merchandise, self serve areas
- Sheet metal scribing
- League Baseball infield
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- Fine bench & machine work
- Store feature displays
- Jewlery&watch manufacturing
- Fine automatic machines
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