Architects must consider many factors in designing a building.

_1_ Q. Lighting is an essential aesthetic consideration in the design of a building's interior.
_4_ R. It's source of daylight, high overhead and filtered through stained glass, creates exciting patterns of light and shade throughout the cathedral.
_5_ S. Of course, the modern designer need not rely on natural light, since artificial light can be employed to achieve the same effect.
_2_ T. An identical strategy has been used successfully in contemporary interiors that have skylights or high windows to provide various pattern of lights.
_3_ U. The majestic quality of the interior of a Gothic cathedral is very much related to the superior handling of light by the architect, for example.

I agree that 1 is Q.

However, I disagree with your other answers. How about U for 2?

Ugh! That means I failed the test! 😢

Why did you post this if you'd already submitted your answers?

I wanted to see if I got it right or wrong.

To answer the question related to lighting as an essential aesthetic consideration in the design of a building's interior, we can refer to the statements in the given text.

The relevant statements that provide information about lighting in the design of a building's interior are:
_1_ Q. Lighting is an essential aesthetic consideration in the design of a building's interior.
_5_ S. Of course, the modern designer need not rely on natural light, since artificial light can be employed to achieve the same effect.
_2_ T. An identical strategy has been used successfully in contemporary interiors that have skylights or high windows to provide various patterns of light.

By analyzing statement _1_, it directly mentions that lighting is an essential consideration in the design of a building's interior. This provides the main answer to the question.

Additionally, statements _5_ and _2_ provide further support for this answer. Statement _5_ highlights that artificial light can be used effectively, which suggests that architects have the flexibility to utilize different lighting sources to enhance the aesthetic appeal. Statement _2_ mentions the successful use of skylights or high windows in contemporary interiors to create various patterns of light.

Therefore, based on these statements, we can conclude that architects must consider lighting as an essential aesthetic consideration in the design of a building's interior.