ARCHITECTURAL | Specialty | 1 Question (EASY)

ARCHITECTURAL LIGHTING (Beam Angle)

(1 Question, Difficulty Level: EASY)
by Raison John J. Bassig

In the dining area with a 3.20-m ceiling height of the house you designed, you specified a circular hanging downlight centered above the space allocated for a dining table. According to the lamp manufacturer, its beam angle is 52°.

Your client then bought a round dining table, measuring 160cm-diameter x 62cm-high, and instructed you as her architect, that the direct lighting from the lamp should illuminate only up to the exact edge of the table. What will be the resulting mounting height of the hanging lighting fixture measured from the ceiling to accomplish your client's requirement?

(Image courtesy of Bumpermankh.com, modified)

ARCHITECTURAL | Specialty | 1 Question (EASY-MODERATE)

TROPICAL ARCHITECTURE (Solar Zenith Angle)

(1 Question - Difficulty Level: EASY to MODERATE)
by Raison John J. Bassig

In the kitchen window (which is directly oriented towards the afternoon sun) of a house you are designing, you specified that a sloped "media agua" must be affixed at a point 0.32m above the window header.  This "media agua", 75cm in length, was then installed at a 56° angle from the window opening.  If the window opening is 850mm in height and the window sill is measured 1.25m above the floor, what would be the Solar Zenith Angle, SA, as the sun sets, just before direct sunlight hits the kitchen window?