Light Flashcards
What is the minimum CRI R9 value that meets the requirements of Feature 58, Color Quality?
50
What amount of lux (fc) requires the third requirement of part 1: Visual Acuity for Focus for Feature 53, Visual Lighting Design?
300 lux to 500 lux
Whic feature requires that all computer screens on desks located within 4.5 m of view windows be able to be oriented within a 20° angle perpendicular to the plane of the nearest window and that overhead luminaires not be aimed directly at computer screens?
Feature 57, Low Glare Workstation Design
Intrinsically photosensitive retinal gaglion cells (ipRGCs) are sensitive to what color of light?
Teal-blue
What is the strategy for reducing the amount of glare caused by interior electric light sources with luminance of 20.000 cd/m2 to 50.000 cd/m2?
Shielding the lamps at an angle of 15° or grater
Which part of Feature 56, Solar Glare Control, applies to glazing that is less than 2.1 m (7’) above the floor?
part 1: View Window Shading
In order to mantain visual acuity, task lighting must provide 300 lux to 500 lux at a work surface when ambient light is below what light level?
300 lux
What is the minimum light reflectance value (LRV) required for vertical surfaces that are visible from regularly occupied spaces for Feature 59, Surface Design?
LRV of 0.7 for at least 50% of surface area
Part 2: Glare Minimization of Feature 55, Electric Light Glare Control, requires that bare lamps more than 53° above the center of view have luminance less than what level?
8.000 cd/m2
Which percentage of area for annual sunlight exposure (ASE) required part 1: Healty Sunlight Exposure, Feature 62, Daylight Modeling?
<=10% of total area
What is the minimum CRI Ra value (CRI avarage of reference colors R1 through R8) that meets the requirements of Feature 58, Color Quality?
80
