Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
In case of commercial installations, it is advisable to use light sources rendering high colour for installations so as to retain customer attention. This light should be as bright as its surroundings in the range of __________.
10 times
5 times
20 times
2 times
5 times
In commercial and retail lighting, the brightness of the focal area (merchandise or displays) is maintained at 5 times the general ambient illumination level to ensure visual hierarchy and consumer focus. This contrast ratio effectively directs the shopper's attention toward the product display while maintaining acceptable visual comfort.
IS 6665: Code of Practice for Industrial Lighting (General guidelines used in commercial interior design standards)
In commercial and retail lighting, the brightness of the focal area (merchandise or displays) is maintained at 5 times the general ambient illumination level to ensure visual hierarchy and consumer focus. This contrast ratio effectively directs the shopper's attention toward the product display while maintaining acceptable visual comfort.
RcontrastтАЛ=EambientтАЛEaccentтАЛтАЛтЙИ5
L=d2Icos╬╕тАЛ├Ч╧Б
The human visual system is naturally attracted to areas of higher luminance, a phenomenon often referred to as 'visual gravity'. By designing an accent-to-ambient ratio of 5:1, designers utilize contrast sensitivity to create a focal point without causing excessive glare or visual fatigue in the surrounding space.
High contrast ratios help in creating 'points of interest' in large retail volumes.
Color Rendering Index (CRI) is critical in commercial spaces to ensure true appearance of goods.
Excessive ratios beyond 10:1 may cause discomfort glare and visual clutter.
Ambient lighting provides the baseline visibility, while accent lighting provides the engagement.
Enhances aesthetic appeal of merchandise
Directs customer traffic flow efficiently
Increases perceived value of products
Higher energy consumption due to localized spot lighting
Potential for thermal heat buildup from accent sources
Requires precise installation to avoid distracting glare
Retail store shelving displays
Art gallery spotlighting
Automotive showroom focal displays
A ratio of 5:1 is widely accepted as the standard balance between stimulation and comfort.
Lower ratios (e.g., 2:1) are often insufficient to distinguish focal points from the ambient, leading to a flat, uninteresting environment.
B is correct тАФ In commercial lighting design, an accent-to-ambient ratio of 5 times is the standard recommendation to ensure product visibility and customer engagement.
Always remember that in illumination engineering, contrast is as important as absolute intensity; increasing total lumens without balancing ratios creates glare rather than visual focus.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants