UFC 3-535-01
17 November 2005
CHAPTER 4: STANDARDS FOR RUNWAY LIGHTING SYSTEMS
4-1
GENERAL DESCRIPTION
4-1.1
Runway Perimeter Lighting
Runway edge lights, threshold lights, and runway end lights are used to outline the
lateral and longitudinal limits of the usable surface of the runway. They are required for
VFR night operation and for all categories of instrument operations.
4-1.2
Runway Surface Lighting
When Category II or III instrument operations are necessary, the perimeter lighting is
augmented with touchdown zone and centerline lighting installed in the runway surface.
4-1.3
Runway Visual Aid Requirements
Tables 2-1A and 2-1B show the visual landing aids required under various conditions.
4-2
HIGH INTENSITY RUNWAY EDGE LIGHTS (HIRL)
4-2.1
Purpose
HIRLs provide visual guidance during takeoff and landing operations at night and under
low visibility conditions. High intensity runway edge lights are required for Category I, II,
and III instrument operations.
4-2.2
Configuration. Locate runway edge lights along the full length of the
runway in two parallel rows equidistant from the centerline. Place along the edge of the
area declared for use as the runway or outside the edge of the area not more than 3
meters (10 feet). (See Figure 4-1.)
4-2.2.1
Light Spacing
Longitudinally, space the lights along the runway light lines at equal distances not
exceeding 60 meters (200 feet). Determine the distance between lights by dividing the
length of the runway light line between the threshold light lines into equal spaces
approaching but not exceeding 60 meters (200 feet).
4-2.2.2
Elevated Lights
Use elevated lights in all instances except as noted in paragraph 4-2.2.3. Size the
fixtures, light bases, and transformer housings to accept in-pavement fixtures in the
event of future runway configuration changes or modifications where elevated fixtures
may not be suitable.
4-2.2.3
In-pavement Fixtures
Use in-pavement units in areas where elevated lights are subject to damage from jet
blast, operation of an arresting system, or interference with aircraft operation. (See
paragraph 13-10.1.)
4-2.3
Photometric Requirements
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