CLC Lighting Calculations & Software 3

Question 1

When performing an average-to-minimum uniformity ratio calculation for a roadway, which IES standard provides guidance?

Accepted Answer

IES RP-8

Answer

IES RP-8 (Roadway Lighting) specifies uniformity criteria including average-to-minimum and maximum-to-minimum ratios for roadway applications.

Question 2

What does a 'luminous intensity distribution curve' (LIDC) plotted in polar form directly show?

Accepted Answer

Candela output in all directions around the luminaire

Answer

A polar LIDC plots candela values at every angle around the luminaire, visually showing the shape and intensity of the light distribution.

Question 3

In energy code compliance calculations (ASHRAE 90.1), LPD is expressed as:

Accepted Answer

Watts per square foot (W/ft²)

Answer

Lighting Power Density (LPD) is the total wattage of lighting divided by the floor area, expressed as W/ft² in US energy codes.

Question 4

Which software tool is specifically designed for outdoor sports lighting compliance with IESNA RP-6 standards?

Accepted Answer

AGi32 with Sports Lighting module

Answer

AGi32 includes dedicated sports lighting calculation features that support IESNA RP-6 analysis for athletic facilities.

Question 5

A luminaire has a BUG rating of B2-U0-G1. What does the U0 component indicate?

Accepted Answer

Zero uplight output, fully shielded above horizontal

Answer

In the BUG (Backlight-Uplight-Glare) rating system, U0 means zero uplight — no light is emitted above 90°, making it fully cutoff for upward light.

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