Lamp Types or Electric Light Sources Flashcards
Incandescent Lamps (INC)
wire filament and GASES in a glass bottle with an Edison base.
High Intensity Discharge Lamps (HID)
WIRE FILAMENT AND GASES, need a ballast
3 chemicals in HID lamps
1) MERCURY VAPOUR (MV)
2) HIGH PRESSURE SODIUM (HPS)
3) METAL HALIDE (MH) AND CERAMIC METAL HALIDES (CMH)
FLOURESCENT TUBES (FL)
(GASES IN A GLASS TUBE) REQUIRE A BALLAST TO ACTIVATE OR START, AND AR AVAILABLE IN VARIOUS TUBE SIZES AND CONFIGURATIONS
FLOURESCENT TUBE TYPES (SHAPES)
1) STRAIGHT TUBE
2) U SHAPE
3) CIRCULAR
4) TWIN TUBE
CFL COMPACT FLOURESCENT LAMPS
FLOURESCENCE TECHNOLOGY ADAPTED TO AN EDISON BASE BUT INCLUDES BUILT IN, INTERNAL BALLAST.
EXAMPLES OF CFLS INCLUDE?
NEON LIGHTS
FIBRE OPTICS
LED : LIGHT EMITTING DIODE
OLED : ORGANIC LIGHT EMITTING DIODE
NEON LIGHTS:
NEON LIGHTS ARE A TYPE OF COLD CATHODE GAS-DISCHARGE LIGHT. A NEON TUBE LIGHT IS SEALED GLASS TUBE WITH A METAL ELECTRODE AT EACH END FILLED WIHTH ONE OF A NUMBER OF GASES LOW AT PRESSURE
FIBIRE OPTICS:
OPTICAL FIBRE IS USED FOR TRANSMITTING LIGHT FROM A REMOTE LOCATION OF A LIGHT SOURCE. FIBERS NOT ONLY TRANSMIT LIGHT BUT CAN GLOW ALONG THE FIBER ITSELF.
LED: OR LIGHT EMITTING DIODE
SOLID STATE TECHNOLOGY. WHEN A FITTING VOLTAGE IS APPLIED TO THE ENERGY IN THE FORM OF PHOTONS. CALLED ELECTROLUMINANCE. AND THE COLOR OF THE LIGHT IS DETERMINED BY THE ENERGY BAND GAP OF THE SEMI CONDUCTOR.
OLED : ORGANIC LIGHT EMITTING DIODE
IS A LIGHT EMITTING DIOD IN WHICH THE EMISSIVE ELECTROLUMINESCENT LAYER IS A FILM OF ORGANIC COMPOUND WHICH EMITS LIGHT IN RESPONSE TO AN ELECTRIC CURRENT.”
WHAT ARE TWO LIGHT DISTRIBUTION PATTERNS?
1) POINT SOURCES (FOCUSED POINT LIGHT, OR TARGETED LIGHT)
2) LINEAR SOURCES (LINEAR DIFFUSION OR DISTRIBUTION/AREA LIGHT)
DO LINEAR SOURCES HAVE OPTICAL CONTROL?
NO THEY DO NOT HAVE BEAM CONTROL
POINT SOURCES CAN HAVE BUILT IN CONTROL REFERED TO AS ______.
OPTICS
HEAT PRODUCTION THROUGH LAMPS.
HIGH PRODUCER LAMP IS ?
LOW PRODUCER LAMP IS?
HIGH: INCANDESCENT
LOW: FLORESCENT
LIGHT OUTPUT
INITIAL LUMEN PRODUCTION
MEAN (AVERAGE ) LUMEN PRODUCTION
SUM DIVIDED BY LAMP LIFE IN HOURS
RATED LAMP LIFE IS MEASURED IN WHAT?
LAMP LIFE EXPECTANCY IN HOURS
EFFICACY
WATTS NEEDED TO OPERATE A LAMP RELATIVE TO ITS LUMEN PRODUCTION
OPERATING POSITION:
THE ORIENTATION OF A LAMP BASE IN THE FIXTURE
LIGHT LOSS DEPRECIATION: (LLD)
INITIAL LUMEN PRODUCTION (100%) THROUGH TO EX. 70 %.
DIRT DEPRECIATION FACTOR
AMBIENT DIRT (DUST PARTICLES) CAN REDUCE LIGHT OUTPUT.
SPECTRAL COLOUR OF LIGHT
PERCEPTIBLE APPEARANCE, COLOUR TEMPERATURE (K)
CRI: COLOR RENDERING INDEX
INDEX (SCALE) 0-100 INDICATING HOW A LIGHT SOURCE WOULD RENDER SURFACE COLOUR COMPARED WITH A CONTROL SAMPLE. (PERFORMED INA LAB)
80-100 CRI IS CONSIDERED RELIABALE FOR _______ SPACES.
INTERIOR
