Lighting Systems Flashcards
What type of light emits when current flows through a tungsten filament?
Incandescent
What type of light uses 30% less voltage to maintain light after start up?
Neon
What type of light functions under vaccuum?
Sealed-beam
What type of light produces in short wave ultraviolet light?
Fluorescent
What type of light produces when current passes through a semi conductor?
LED
What type of light emits by electric arcs jumping across tungsten electrodes?
High-intensity Discharge (AKA Xenon)
How long does it take a HID bulb to turn from a white glow to a blue glow?
2 weeks
Which 2 bulb types use ballast?
HID and Fluorescent
Which component converts DC to AC
Ballast
What is the clear capsule surrounding the bulb filament called?
Envelope
What gas is normally used inside the envelope of a halogen bulb?
Argon or Iodine
What 2 components are found in a HID bulb?
Metal salts & Xenon gas
Which component is responsible for spiking the voltage of a HID assembly?
The Ignitor
What Voltage is required to initially start an HID headlight?
15,000v to 30,000v
What is the operating voltage of an HID system?
80v
When did the US permit replaceable blubs?
1983
When were DRL’s made mandatory in Canada?
1990
How many degrees can automatic adjusting headlights move?
5° to the left & 15° to the right
at what distance do you park the car from the wall when adjusting headlights without machine?
8m (25ft.)
How long does it take a conventional tungsten blub to illuminate?
200 milliseconds
How long does it take a neon lamp to illuminate?
3 milliseconds
How long does it take an LED to illuminate?
Less than a millisecond
How many amps can a Halogen Bulb use?
up to 25A
What electronic device do automatic dimming headlights use to activate the dimming circuit?
photo diode
What device must be included in the circuit when adding auxiliary lights?
Relay
What type of headlights are used in vehicles with electronically adjusting headlights?
HID
What type of switch is used in a simple turn signal flasher?
Bi-metal
What is the name for the feature that illuminates the high-beam headlights even when the headlight switch is off or in the low beam position?
“flash to pass”
What is the most common method of controlling daytime running lights?
applying reduced voltage to headlights
Fog lights must be mounted in which location of the vehicle?
below the bumper & away from the centerline
What circuit protection device enables the headlights to continue to operate, even after a temporary short circuit?
circuit breaker
What is the most likely problem if the interior lights don’t operate when the door is opened, but may be turned on with the interior light switch?
Door switch stuck in open position
Why do HID headlights appear blue in color?
burning gas gives off a blue light
What type of gas is used in an HID headlight?
Xenon
