Crestron electronic Residential Lighting Grazing and Washing Surfaces, Color Temperature, Glare

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Residential Lighting Design Guide

Appendix C

Grazing and Washing Surfaces

On walls or on the surface of an object, changing the way light is focused produces different effects. To emphasize a rough textured brick wall, graze the surface with light striking the surface at a sharp angle. To emphasize a smooth wall, wash the surface with light by striking the surface at a wider angle.

Switch and Dimmer Locations

The proper location for a switch or dimmer is a function of code requirements (the National Electrical Code establishes some specific locations where control devices are required) and common sense. For example, the code requires a wall switch adjacent to the door upon entry to a room. but you can also add a switch in a preferred location, such as next to the bed.

Another choice are motion sensors that automatically switch lights off when the room is empty, and they are especially efficient devices in spaces like garages, utility rooms and other spaces where lights are only needed occasionally and are often left on inadvertently.

Crestron offers the most technologically sophisticated products that permit handheld remote dimming, whole house master controls, and many other features.

Color Temperature

Color temperature is the color of the light source. By convention, yellow-red colors (like the flames of a fire) are considered warm, and blue-green colors (like light from an overcast sky) are considered cool. Color temperature is measured in Kelvin (K) temperature. Higher Kelvin temperatures (3600–5500 K) are considered cool and

lower Kelvin color temperatures (2700–3000 K) are considered warm. Cool light is preferred for visual tasks because it produces a higher contrast than warm light. Warm light is preferred for living spaces because it is more flattering to skin tones and clothing. A warm color temperature of 2700–3600 K is generally recommended for most indoor general and task lighting applications.

Color Rendition

Color rendition is the appearance of colors when illuminated by a light source. Color rendition is generally considered to be a more important lighting quality than color temperature. Most objects are not a single color, but a combination of many colors. Light sources that are deficient in certain colors may change the apparent color of an object. The Color Rendition Index (CRI) is a 1–100 scale that measures a light source's ability to render colors the same way sunlight does. The top value of the CRI scale (100) is based on illumination by a 100 watt incandescent light bulb. A light source with a CRI of 80 or higher is considered acceptable for most indoor residential applications.

Glare

Glare is primarily the result of relative placement of light sources and the objects viewed. Often, it is excessive brightness from a direct light source making it difficult to see. A bright object in front of a dark background usually causes glare. Bright lights reflecting off a television or computer screen or even a printed page produces glare. Intense light sources—such as bright incandescent lamps—are likely to produce more direct glare than large fluorescent lamps.

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Contents Crestron Green Light Residential Lighting Design Guide Page Page Contents Page Introduction Single Solution Control System Crestron ExclusiveCrestron Green LightTM Crestron Control TechnologySystem Design Lighting System Design Types Wireless SystemsCentralized Wired Systems System Design Crestron Residential Lighting Design Guide Decentralized Wired SystemsHybrid Systems Load Schedule Specifying a Lighting SystemRequired Load Schedule Items Total Example Load Schedule with Panel TerminationsEquipment List Specification Residential Lighting Wiring PlanOrdering a Crestron Residential Lighting System Steps to order a lighting systemCAEN- Series Enclosures Green Light OptionsCaen Enclosures Crestron Residential Lighting Design Guide SpecificationsCaen Enclosure Framing Caen InstallationCaen 2X1, 4X1, and 7X1 Framing Caen 4X2 FramingCaen Wiring Universal Mounting Plates Cover Extension Kits CLX Lighting Control Modules Model Load Rating CLX-Series Lighting Control ModulesTerminal Blocks and Modules Single Width Enclosure Mounting Module InstallationCresnet Terminal Block for Caen Automation Enclosures Doc F Crestron DIN Rail Products FeaturesDIN Rail Installation Example DIN Rail System DIN-AP2 DIN-1DIMU4 Phase-Synchronous Detection CircuitryAuto Load Detection Short Circuit ProtectionDIN-2MC2 DIN-8SW8DIN-4DIMFLV4 DIN-IO8 DIN-AO8Analog Outputs VersiportsDIN-BLOCK Cresnet Power DistributionDIN-PWS50 Cresnet DistributionSegment Cresnet Hub DIN-HUBInterface Equipment TPS Series Isys Wall Mount TouchpanelsTPS Isys G-Series with Crestron Home or QuickMedia Tpmc Isys I/O with Crestron Home or QuickMediaTPS-4L TPS-4000LTPMC-8L TPS-4000 Tilt TouchpanelsTPMC-8T Tpmc Series Isys i/O WiFi TouchpanelsTPMC-8X TPMC-4XGTPS-6X Wireless Touchpanels and HandheldsMT-1000C ML-600C2N-DB Mounting KeypadsC2N-DB Series Decorator Keypads Mounting in Single-Gang Box CNX Designer Series KeypadsCameo Mud Ring Mount Kit Cameo Mounting Options Cameo Flush MountILux Integrated Lighting Control System ILux Features Wireless iLux Remote Multi-Unit Expansion Control System Integration UL2043 rated for use in air handling spaces ILux Expansion ModulesModel Load Function Expansion Modules Wiring Diagrams Wall Box Dimmers and Switches Cresnet Wall Box Dimmers Model Load FeaturesCLW-SLVS Cresnet Wall Box SwitchesInfiNET Wireless Technology InfiNET Dimmers, Switches, and Thermostat Example infiNET system PAC2 Lighting Control Processor Control ProcessorsPAC2 Power Management & Requirements Series Control System PAC2M Professional Automation Mini Control SystemOverride Basic Lighting System Interconnections Occupancy and Photocell Sensors C2N-SDC Integrated Shade and Drape ControllersC2N-SDC-DC C2N-SSC-2Integrated Systems Integrated Partner ModulesAppendix a Example Residential Lighting System Load Schedule Report Example Residential Lighting Design GuideDescription Load Schedule with Panel TerminationsCircuits and Interfaces Module Wiring PAC2 Lighting Control Processor Connections Appendix B Touchpanel Comparison Charts Appendix B Isys I/O WiFi MiniTouch Handheld Remotes Wireless Touchpanels & Handheld RemotesStatic and Dynamic Elements Appendix C General Lighting Design ConsiderationsSimple Lighting Coverage Areas Task Lighting for Specific Work AreasDecorative Lighting Ambient Lighting for Mood and HighlightsFocal Lighting Key LightColor Temperature Switch and Dimmer LocationsGrazing and Washing Surfaces Color RenditionAppendix D Glossary of Lighting Terminology Crestron Lighting Software Appendix D Crestron Residential Lighting Design Guide Crestron Lighting Software Appendix D TWIN-TUBE see Compact Fluorescent Lamp
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