Psychology Dictionary
  • Dictionary
    • A
    • B
    • C
    • D
    • E
    • F
    • I
    • J
    • K
    • L
    • M
    • N
    • O
    • P
    • R
    • S
    • T
    • U
    • W
    • Y
    • Z
  • Health Topics
    • ADHD
    • Anxiety Disorders
    • Bipolar Disorder
    • Breast Cancer
    • Depression
    • Diabetes
    • Dissociative Disorders
    • Epilepsy
    • Insomnia
    • Neurology
    • Oncology
    • PCP
    • Pediatrics
    • Personality Disorders
    • Primary Care
    • Schizophrenia
    • Sleepdisorders
    • Substance Abuse Disorders
Aa
Psychology Dictionary
Aa
Search
  • Dictionary
    • A
    • B
    • C
    • D
    • E
    • F
    • I
    • J
    • K
    • L
    • M
    • N
    • O
    • P
    • R
    • S
    • T
    • U
    • W
    • Y
    • Z
  • Health Topics
    • ADHD
    • Anxiety Disorders
    • Bipolar Disorder
    • Breast Cancer
    • Depression
    • Diabetes
    • Dissociative Disorders
    • Epilepsy
    • Insomnia
    • Neurology
    • Oncology
    • PCP
    • Pediatrics
    • Personality Disorders
    • Primary Care
    • Schizophrenia
    • Sleepdisorders
    • Substance Abuse Disorders
Follow US
© PscyhologyDictionary.org. All Rights Reserved.
Home > I > ILLUMINATION CONDITIONS
I

ILLUMINATION CONDITIONS

By N., Sam M.S.

Our ability to perform tasks that require visual discrimination is greatly influenced by lighting conditions. But in determining the optimum level of light, the character of the object under observation—its size, and the amount of brightness, contrast, and detail it contains—as well as the time allowed for seeing must be taken into consideration. A small, black-on-gray highway sign requires more illumination than a large, clearly printed black and white sign; and finely detailed articles moving rapidly along an inspection belt must be examined under more intense light than large, crude objects. Studies show that vision improves sharply when low level illumination is increased, even a small amount, but with further increases the improvement becomes slower and eventually levels off. However, this is merely a general finding since the optimal amount of light differs widely from one type of work to another. The following recommended levels take into account both efficiency and comfort, and are based upon widely accepted research performed by Blackwell (1959). Close inspection requires 500 foot-candles; proofreading, 150; general office work,100; wrapping and labeling, 50; dishwashing, 30; loading packages, 20; hotel lobby, 10. (A forty-watt lamp produces about 10 foot-candles on a surface two feet away.) A survey made by Tinker in 1939 revealed that many factories were far below the standard for effective illumination. Many industrial operations were being performed under an average illumination of less than 3 foot-candles—and when the level was raised to 11 foot candles, production was found to increase an average of 15 per cent.Two other considerations are of major importance. First, the general work area should be adequately and uniformly illuminated, and there should be little difference between this levelof illumination and the light that falls on the work object. The second principle is related to this point: lights should be positioned in a way that will minimize glare, since glare spots tend to blind and fatigue the eyes.

Cite this page: N., Sam M.S., "ILLUMINATION CONDITIONS," in PsychologyDictionary.org, November 28, 2018, https://psychologydictionary.org/illumination-conditions/ (accessed June 1, 2023).
Share this Article
Facebook Twitter Email Copy Link Print
Avatar photo
By N., Sam M.S.
Sam holds a masters in Child Psychology and is an avid supporter of Psychology academics.
Leave a comment Leave a comment

Leave a Reply

Your email address will not be published. Required fields are marked *

Latest Posts

Evaluation of a Quantitative Study
Service Team Roles
Intelligence Across the African-American and Latino Cultures
Cultural Norms & Values in the African-American Population
Evaluation of a Qualitative Study
Crisis Intervention
DSM-5 Criteria for Social Anxiety Disorder
Selecting a Diagnosis

Popular Psychology Terms

JUDGMENT
MEDICAL MODEL
HYPERMNESIA
AFFIRMATION
BRAINWASHING
BACKUP REINFORCER
QUALITY
WELL-BEING
MESSAGE-LEARNING APPROACH
AFFILIATIVE BEHAVIOR

Read This Next

WUNDT, WILHELM MAX, (1832— 1920)

By N., Sam M.S.

YERKES, ROBERT MEARNS (1876- 1956)

By N., Sam M.S.

SZONDI TEST

By N., Sam M.S.

WHITE, WILLIAM ALANSON (1870- 1937)

By N., Sam M.S.

TALION LAW

By N., Sam M.S.

WITHDRAWAL

By N., Sam M.S.

TALKING IT OUT

By N., Sam M.S.

WITHDRAWAL SYMPTOMS

By N., Sam M.S.

About Us

Powered by Psychology Dictionary: the only Free Online Psychology Dictionary

Follow Us

©2023 PsychologyDictionary.org

  • About
  • Contact
  • Advertise
  • Terms of Service
  • Privacy Policy