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Kitchen & Bath Lighting

Kitchen & Bath Lighting. A good lighting design should:. Look good – both people and design space Provide the proper amount of light in every room Be built and constructed within budget, code, and other constraints in mind Be environmentally responsible

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Kitchen & Bath Lighting

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  1. Kitchen & Bath Lighting

  2. A good lighting design should: • Look good – both people and design space • Provide the proper amount of light in every room • Be built and constructed within budget, code, and other constraints in mind • Be environmentally responsible • Respond to the architecture and interior design • Produce good color • Achieve the desired mood of each space • Allow lighting control

  3. The layered approach to lighting designBegin by thinking in layers decorative focal task ambient

  4. Decorative

  5. Ambient

  6. ambient decorative

  7. Task

  8. Focal

  9. Lighting Concepts • General Lighting • Task Lighting • Workplane • Distance • Footcandle • Lumen • Candlepower (Candelas) • Watts • Lamp Data Tables

  10. Lighting Concepts general lighting • Every room must have enough illumination for people to navigate through it. • The amount of light will vary depending on the activities performed in the room. • General lighting is measured at the workplane level. If there is no workplane like in the living room it is calculated at 30” above the floor. • General lighting is measured in “footcandles”

  11. General Lighting • Even light distribution is the key to great general lighting. Fixture placement and spacing must be accurately placed based on the lamps cone of light.

  12. EDGE OF BEAM SHOULD NOT INTERSECT CABINET FRONT LIGHT SCALLOPS BAD! TASK LIGHTING GENERAL LIGHTING GENERAL LIGHTING

  13. Task Lighting • Working at the sink • Working at a desk • Working at a prep area • Reading

  14. Lighting Concepts workplane • Workplane – The actual or implied surface on which work happens Distance = Lamp Ht. –workplane height Distance = 96”- 36” = 60”

  15. Footcandles How do we measure the light on a work surface? • Footcandle – a unit of measurement that describes the amount of light on a surface, workplane, art, etc. • Lux – The European Footcandle Lux = FC x 10.76 FC = Lux x .0929

  16. Footcandles • Sphere w/ 1 foot radius • 1 SF of sphere surface • 1 Footcandle is the amount of light falling on that surface • There are 12.57 of these one radius square curved planes in any sphere. • Sphere surfaces are known as Steradians

  17. Lumens Let’s talk about another form of light measurement • Lumen – a unit of measurement defining the quantity of light a lamp produces. • In order to achieve the proper amount of footcandles necessary to illuminate a work surface we must know the strength of the light source. • Only then can we determine how many are needed and how far apart they are spaced.

  18. Candlepower • Candlepower – the measurement of a lamps intensity, but only if it is directional

  19. Sun’s intensity measured in LUMENS LEAST footcandles! MOST! footcandles MORE footcandles

  20. 5’ 16,000 candle power 1,250 candle power 3,600 candle power 50 footcandles 144 footcandles 640 footcandles

  21. Beam Angle • A directional lamp focuses or redirects its light energy into a cone emanating from a lamp’s lens where it is measured in candlepower • The center of the cone has the most intense light • The edges have the least

  22. The beam angle is defined where candlepower drops off to 50% From 50% to 10% is called spill light

  23. Watts • Wattage tells us how much power or energy is burned by a lamp • Wattage tells us nothing about the amount of light a lamp can produce • A 60 watt PAR38 lamp will have ~ three times the candlepower when compared to a 75 watt R40 lamp.

  24. Color and Reflectance

  25. Color and Reflectance • Color Temperature • Color Rendition Index (CRI) • Reflectance

  26. Color Temperature

  27. Color Temperature • Color temperature is measured in Kelvin • 10,000K appears blue • 1000K appears red • 3000K to 3600K is considered neutral

  28. Color Temperature • Lower color temperature means warmer color • Higher color temperature means a cooler color

  29. Cool colors Warm colors

  30. Color Rendition Index

  31. Color Rendition Index • Color Rendition Index is a scale from 1 to 100 which describes the effectiveness of a light source in reproducing accurately, an objects color. 100 being the best. • The sun has a CRI of 100 • The best lamps to use are ones with a CRI over 80 • Incandescent lamps have a CRI of over 98 • Fluorescents are the ones for which we must be careful

  32. CRI • Typical 4 foot fluorescent tube cool white or warm white bulbs have a CRI of around 50 and 60 respectively • Color corrected fluorescent lamps are now available in 70 and 80 CRI and those with rare earth phosphorus reach 90

  33. Color Temperature VS CRI • Color Temperature describes how the lamp itself appears when illuminated. • CRI describes the effectiveness of a light source in reproducing accurately, an objects color.

  34. All together now! • Lumens define the quantity of light • Candlepower defines the intensity of light • Footcandles defines the amount of light on a surface

  35. All together now! • Color temperature describes how the lamp itself appears • CRI describes the effectiveness of a light source in reproducing accurately, an objects color.

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