Light n Stufff Flashcards
Electric Current?
Electric current is transported over long distances by a high voltage transmission, as it approaches its destination it is stepped down by transformers to 120 Volts ‘line voltage’. At this point, the current is connected to an electric meter and circuit panel (15 Amp)
Energy Efficiency?
is predicted on high light production, or high light output
Energy consumption required to operate a lamp?
1__ = 1000W
1 KILOWATT = 1000W
Circuts are loaded to __% capasity
80%
Brightness Perception?
Light is percieved as brightness fuck
SPECTRAL COLOUR?
The visible light of the electromagnetic spectrum (the colour of light)
PERCEIVED COLOUR:
reflected light, acting with or on the pigment of an object’s material
PERCEIVED APPEARENCE affected by (3)
1) shade conditions 2) shadow conditions 3) highlight conditions
LUMINOUS FLUX?
light output - expressed in LUMENS
ILLUMINACE? huh?
is light that arrives at 1sq. ft. surface or task plan express in FOOTCANDLES. (1f.c. = 1 lm) of light density
light is reflected in multiple directions on matte surface
diffuse reflection
the result of opaque materials blocking light transmission and cast shadww
NO transmission DUHHH
frosted glass is an example of? regular glass is an example of?
1) Diffused transmission 2) transmission
light is reflected from a shiny surface in a pattern where the angle of incidence (arriving) is equal to the angle of exitance
specular reflection SPECTACULAR
LUMINANCE?
is reflected light, measured in candelas the perceptual sensation of luminance is brightness perception
how a light source will affect a surface colour is called?
Color Rendering Index
Name the 3 main lamp types. Provide general description and how much heat they produce
1) Fluorescence: gasses in glass tubes, require a ballast, low heat producer
2) Incandescent: gasses in a bottle, with edison base, high heat producer
3) LED: “light emitting diode” energy released in the form of photons, huh?
The difference between Uniform and Non-Uniform atmospheres??????!!!
NOTHINGGGG much other then that uniform atmosphers provide even luminance in space and non-uniform creates high contrast in space
________ ________ Pattern: 1) point source (focused) 2) linear source (diffusion)
LIGHT DISTRIBUTION PATTERN
initial lumen production 100% to 70%
LOSS LIGHT DEPRECIATION
LUMINAIRE CLASSIFICATIONS:
6 types? name 5 ways they can be mounted
Direct, semi-direct, semi-indirect, direct-indirect, general diffuse, indirect
recessed, semi-recessed, surface mounted, suspended, wall mounted
technique used to produce even wash of light on vertical surface from top to down
wall washing CINDERELLAAA
technique used to produce a wash of light across a ceiling
cove lighting, aint that the truth
technique that uses downcasters, or uplights produce glazing lights close to vertical surfaces
Grazing and Scallops
What is spot lighting? its best application?
a focused, targeted, defined spot - stripper pole
