NCIDQ IDFX Practice Exam

What is the typical color temperature range for incandescent lighting?

1. 3000-3500K

2. 2700-2800K

3. 4000-4500K

4. 5000-6000K

The correct answer is: 2700-2800K

The typical color temperature range for incandescent lighting is generally considered to be between 2700K and 2800K. This range produces a warm, soft light that is reminiscent of the natural light from sunrise and sunset, which is often preferred in residential settings for creating a cozy and inviting atmosphere. The warm glow of incandescent bulbs contributes to a sense of comfort, making them popular choices for living spaces and dining areas. Other options provide color temperatures that are not characteristic of traditional incandescent bulbs. For example, the ranges of 3000-3500K and 4000-4500K represent warmer and cooler color temperatures typically associated with halogen lighting and fluorescent or LED lighting, respectively. The higher range of 5000-6000K is indicative of daylight or cool white sources, which are far removed from the warm light usually produced by incandescent fixtures. Understanding these color temperature ranges is essential for designers when selecting appropriate lighting for different environments to achieve the desired mood and functionality.