One type of illumination system consists of rows of strip fluorescents and ceiling that will transmit light. For this system to be efficient, the surfaces the luminous ceiling MUST be above

a. installed by the electrician

b. metallic

c. black

d. highly reflective (white)

the luminous ceiling MUST be highly reflective (white)

Explanation:

Different illumination systems can be selected for different areas of the building. In a merchandise area, mostly in a pharmacy, the electrician needs to make the illumination system to be efficient by making the surfaces above the luminous ceiling to be highly reflective white. This illumination set-up would be part of the conditions necessary for visual comforts to be attained in those areas at all times.