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Ch. 9 Color and Light, Review and Assess - Coggle Diagram

- - - - low initial cost
      - inexpensive to dim
      - high CRI
      - adds glitter and sparkle
      - enhances texture and luster
    - - lowest efficacy
      - produce heat
      - short life
  - - - linear or compact sizes
      - high efficiency
      - cold light--no heat generation
      - good CRI
      - a ballast to start the current flowing through the lamp
      - a long life
    - - a higher initial cost than incandescent lamps
      - inappropriate for outdoor use in cold temperatures. Because they contain mercury
      - CFLs require careful disposal rather than tossing them in the landfill.
      - poor color rendering capabilities and flickering can occur
  - - - Mercury Vapor (MV) Lamps--used primarily outdoors
        
        Mercury vapor (MV) lamps were the first HID lamps developed. They use radiation from mercury vapor to provide illumination. MV lamps cast a blue light, which is particularly good for landscaping applications (lighting a blue spruce tree). However, because of their inefficiency
        and the improvements of other lamps, the phase-out of MV lamps is happening over time.
      - Metal Halide (MH) Lamps--often used indoors due to good CRI
        
        Metal halide lamps use chemical compounds of metal halides and metallic vapors to illuminate the lamp. They are the most popular HID lamps on the market with many indoor and outdoor applications. They have high efficacy, good color rendition, long life, and a wide range of colors and wattages. They are the number one HID lamp to use if people are present in or using the space. Common applications include gymnasiums, indoor arenas, malls, car lots, and hotels.
      - High-Pressure Sodium (HPS) Lamps--used primarily outdoors
        
        High-pressure sodium (HPS) lamps use sodium vapor for illumination. They have the best lumens per watt (LPW) rating because they can last 40,000 hours. You often find HPS lamps in car headlights--especially in Europe, in street lamps on highways, and in manufacturing facilities. HPS lamps have poor color rendering because the sodium gas in the glass envelope is orange, causing the emerging light to have an orange cast.