There are no published guidelines on the adequacy of lighting and how to check for light adequacy without instruments. However, the Illuminating Engineer Society (IES) has recommended that for casual reading an illumination level of 100 lux is sufficient. Also the Government of India recommends up to 100 lux of illumination in living rooms.
Hence, it seems practical that if one is able to read news print in all the corners and the center of the room and also in the darkest portion of the room, the lighting can be considered adequate, provided there is no glare and the light does not directly fall in the eyes.
References:
• Poornima Tiwari, Shashank Tiwari. Chapter 13, In: Mastering Practicals in Community Medicine. 2nd ed. Lippincott Williams & Wilkins, New Delhi
• Park K. Medicine in social sciences. In: Park’s Textbook of Preventive and Social Medicine, 24th ed. Jabalpur, India: M/S Banarasidas Bhanot Publishers; 2017.
• Veitch JA. Psychological processes influencing lighting quality. J Illum Engng Soc 2001;30(1): 124- 140
• GOI. National Building Code, Part 8, Section 1: Lighting and Ventilation. New Delhi: BIS; 2005.
Modified Kuppuswamy Classification of Socio - Economic Class: http://www.ihatepsm.com/blog/modified-kuppuswamy-scale
Prasad's Scale: http://www.ihatepsm.com/blog/prasad%E2%80%99s-scale
Dependency Ratio: http://www.ihatepsm.com/blog/dependency-ratio
Assessment of Overcrowding in a Household: http://www.ihatepsm.com/blog/assessment-overcrowding-household
Checking Adequacy of Lighting in a Room: http://www.ihatepsm.com/blog/checking-adequacy-lighting-room
Assessment of Adequacy of Ventilation: http://www.ihatepsm.com/blog/assessment-adequacy-ventilation
Family and the Types of Family: http://www.ihatepsm.com/blog/family-and-types-family
Checking for Mosquito Breeding Areas in a Household: http://www.ihatepsm.com/blog/checking-mosquito-breeding-areas-household
Housefly Breeding Sites: http://www.ihatepsm.com/blog/checking-fly-breeding-sites-household
Life Cycle of Housefly: http://www.ihatepsm.com/blog/life-cycle-housefly
Types of Piped Water supply: http://www.ihatepsm.com/blog/types-piped-water-supply
Reference Indian Adult Man and Woman: http://www.ihatepsm.com/blog/reference-indian-adult-man-and-woman
Concept of the “Consumption Unit”: http://www.ihatepsm.com/blog/concept-%E2%80%9Cconsumption-unit%E2%80%9D
Methods of Dietary Survey: http://www.ihatepsm.com/blog/methods-dietary-survey
24-Hour Recall (Questionnaire) Method: http://www.ihatepsm.com/blog/24-hour-recall-questionnaire-method
Determination of Socio-economic Status of a Family in a Rural Area (the Uday Pareekh Scale): http://www.ihatepsm.com/blog/determination-ses-family-rural-area-uday-pa...
7 Terms used in Maternal and Child Health: Definition and Explanation: http://www.ihatepsm.com/blog/7-terms-used-maternal-and-child-health-defi...
Terms used in Family Health Study: Definitions and Explanations: http://www.ihatepsm.com/blog/terms-used-family-health-study-definitions-...
Lecture on the definitions and explanations of terms used in Family Health Study: http://www.ihatepsm.com/resource/terms-used-family-health-study-definiti...
Hindi lecture on the definitions and explanations of terms used in Family Health Study: http://www.ihatepsm.com/resource/terms-used-family-health-study-definiti...
Hindi lecture on CSC taking: https://www.youtube.com/watch?v=9gvuXrIJ_gY&t=10s
English lecture on CSC taking: https://www.youtube.com/watch?v=rKxXIyJuBz8&t=24s
Format for CSC taking: http://www.ihatepsm.com/blog/format-clinico-social-case-taking-community...
Geriatric CSC taking: http://www.ihatepsm.com/blog/geriatric-clinico-social-case-community-med...