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Lighting and Color Theory Flashcards

6 cards from real IDFX practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Lighting and Color Theory flashcards as text

  1. Which color rendering index (CRI) value is required for retail spaces where accurate color judgment of merchandise is essential?

    Answer: CRI 90 or above

    Retail environments requiring accurate color appraisal of merchandise — particularly clothing, jewelry, and cosmetics — should use light sources with a CRI of 90 or above to ensure colors appear true to life.

  2. The Munsell Color System describes color using three attributes. Which combination is correct?

    Answer: Hue, chroma, value

    The Munsell System identifies colors by hue (the color family), value (lightness/darkness on a scale of 0-10), and chroma (the saturation or purity of the color).

  3. In additive color mixing (light), which three primary colors combine to create white light?

    Answer: Red, green, blue

    Additive color mixing involves combining light wavelengths. Red, green, and blue (RGB) are the primary colors of light; combining all three at full intensity produces white light.

  4. What is the primary purpose of a photometric report for a luminaire?

    Answer: To document the distribution pattern and output of light from the fixture

    A photometric report (or IES file) documents how light is distributed from a luminaire — including candela distribution, lumen output, beam angles, and efficiency — enabling designers to predict illuminance levels in a space.

  5. Simultaneous contrast in color theory refers to which phenomenon?

    Answer: Colors appearing different depending on the surrounding or adjacent colors

    Simultaneous contrast occurs when adjacent colors influence each other's perceived hue, value, or chroma. For example, a gray square appears lighter against a dark background and darker against a light background.

  6. Which lighting term describes the ratio of the illuminance at the task area to the illuminance in the surrounding non-task area?

    Answer: Task-to-ambient ratio

    The task-to-ambient ratio (or task-to-surround ratio) compares the light level at the work surface to the general ambient level in the room. IESNA recommends a ratio no greater than 10:1 to prevent eye strain.