When a luminaire directs 60% to 90% of emitted light downward and 10% to 40% upward, this is known as what type of lighting?

When a luminaire directs 60% to 90% of emitted light downward and 10% to 40% upward, it is characterized as direct lighting. This type of lighting primarily illuminates the surfaces below it, making it ideal for focused activities such as reading or working, where clear and directed light is necessary.

In direct lighting, the significant proportion of light is directed downwards, which allows for enhanced visibility and concentration in specific areas. This is in contrast to other types of lighting, which may distribute light more evenly or indirectively around a space. Understanding this characteristic is essential in designing effective lighting schemes for various applications.