CLC Lighting Calculations & Software 2

Question 1

In AGi32 or DIALux, what does the 'calculation grid' spacing setting control?

Accepted Answer

The density of illuminance sample points across a surface

Answer

Calculation grid spacing determines how many sample points are evaluated per unit area, affecting result accuracy and computation time.

Question 2

A maintained illuminance value in a lighting design accounts for which factor?

Accepted Answer

Light loss factors applied to initial illuminance over time

Answer

Maintained illuminance equals initial illuminance multiplied by the light loss factor, representing real-world conditions after aging and dirt accumulation.

Question 3

Which IES photometric file format is the current standard used by most US manufacturers?

Accepted Answer

IES LM-63

Answer

IES LM-63 is the IESNA standard format for electronic transfer of photometric data and is widely used by US luminaire manufacturers.

Question 4

In a zonal cavity calculation, the cavity ratio (CR) formula uses which room dimensions?

Accepted Answer

Height, length, and width of the cavity

Answer

The cavity ratio formula is CR = 5h(l+w)/(l×w), using the cavity height, length, and width.

Question 5

What is the purpose of the 'Obstructed Sky Model' in daylighting simulation software?

Accepted Answer

To model sky luminance blocked by surrounding buildings or terrain

Answer

The Obstructed Sky Model accounts for nearby structures or terrain that block portions of the sky dome, reducing available daylight.

(CLC) Certified Lighting Consultant Practice Test

(CLC) Certified Lighting Consultant Practice Test

CLC Lighting Calculations & Software 2