11.14 Lights Flashcards
How is light produced?
Thermal radiation caused by passing a high current through a conductor.
What is luminous intensity measured in?
candela
What is luminous flux?
The amount of light radiated per second.
What is the unit of luminous flux?
Lumen
The ratio between luminous flux and the power consumed is called what?
Efficacy
How much higher is the start up power of a bulb compared to normal consumption?
15 times
What percentage of the energy that goes to a bulb is light?
12%
Why must halogen bulbs glass not be touched?
The aluminosilicate glass absorbs salt and grease from the skin.
What part of a strobe light actually emits the light.
Control electrode.
What are some of the advantages of LED’s?
Reduced mass
Reduced consumption
Longer life
Resilient
What regulation governs lights?
SERA.3215
Are nav lights mandatory?
Yes
What side is the red nav light?
Left
To what degrees must side nav lights be visible?
110 degrees
Rear- 70 degrees
What is the ELMS?
Electronic load management system
Where are the anti-col lights?
Wing tip and or upper/lower fuse
What is the common voltage of a beacon?
28 or 115
How do strobes flash?
Using a set of capacitors that store up the energy and then release it across a gap in a gas filled tube.
How much charge do the capacitors in a strobe store?
450v
Landing lights in dim mode use what voltage?
7 AC
How are landing lights aligned?
Aircraft on level ground and aircraft no more than 5 degrees from level.
What 4 categories of internal lighting are there?
Flight deck
Passenger
Service
Emer
How are incandescent lights manually dimmed?
Potentiometer
Transistor with Zener Diode
Transformer
When is a transistor used instead of a potentiometer?
When a large amount of lights must be controlled
