GRAPHIC TOOLS FOR SHOWING

LIGHTRendering and Light Maps

LIGHT MAPPING: BAKER CENTER CONFERENCE ROOM Draw the light that you want to create

for the space. Use yellow, yellow orange, orange pencils Indicate where you wish to see light on surfaces,

objects, etc. Remember; light is only seen on surfaces, not in

the air.

THE LIGHT MAPPED PLANTHE KEYS TO SUCCESS IN CREATING A LIGHT MAP Think only in terms of light you want to create. Not:

Practicality Ability to construct Luminaire location Luminaire

Think about the quality of light and where it goes Focus on surfaces and objects and how they receive

and reflect light

THE LIGHT MAPPED PLAN Adding to the impact of a Light Map

Vary rendering techniques to represent different sources Create a legend that explains what you are showing

Describing Light Annotate details that can not be clearly understood

through the drawing alone Color, texture, and intensity of the light How light effects mood How the light interacts with surfaces “When in doubt, add a description”

Use the 5 layers of light when developing a light map. Light Mapping Choreography Develop symbols

LIGHTING UNITS AND

MEASUREMENTS

IT’S ALL ABOUT THE LUMEN

Foot-Candle – light produced onto an object a foot away from a candle

Lumen – the basis of all lighting study Onto or striking a surface – illuminance /1 fc = 1 lumen /

1 sq ft. Off or leaving a surface – exitance / no unit of

measurement Exitance = illuminance multiplied(x) reflectance of

surface If reflectance is 50%, existance is half the illuminance

Leaving a surface in a specific direction with a specific density Candelas per square meter (CD/sq.M)

steradian of spherical area – area made of a portion of a sphere

UNDERSTANDING ILLUMINANCE

LEVELS

ILLUMINANCE LEVEL INTUITION Foot Candles = FC

Full Moon Light = 0.1 FCExterior Parking Lot = 1.0 FCDim, Romantic restaurant = 5.0 FCComfortable Living Room = 10 – 15 FCResidential den / study = 20 – 35 FCClassroom / Open Office = 50 – 70 FCLaboratory / Exam Room = 100 FC

ADDING ILLUMINANCE VALUES TO A LIGHT MAP

Annotate Light Map Indicate foot candle requirement

Based on tasks 5 – 35 foot candles = ambience 35 – 55 fc = common in office areas, classrooms,

etc.

LIGHTING FOR VISUAL INTEREST Accent and feature lighting

2 times rule Object should be two times brighter than

adjacent surface2 to 5 times is comfortableMore than 5 times creates glare

Example = wall surface has 10 fcArt would have 20 to 50 fc

IES ILLUMINANCE LEVEL CRITERIA Illuminating Engineering Society of

North America (IESNA) Scientific body that studies light and its

effects on human visual performance www.iesna.org

Published book

IES ILLUMINANCE LEVEL CRITERIA Lighting Design Concerns Checklist

Desired contrast / distinct accentsDesired sparkle / visible sourcesAccurate color renderingColor Appearance of environmentMood and emotional atmosphereModeling of objects and facesVisual Task performanceSystem control and dimmingDaylighting integration / control

IES ILLUMINANCE LEVEL CRITERIA Lighting Design Concerns Checklist

Glare Reflections / Specular MaterialsSensitivity to flicker / strobe effectSensitivity to glareEnergy Conservation / efficiencyMaintenance concernsHeat concernsNoise concernsLight level evenness (reducing shadows)