California Code of Regulations › Title 13 - Motor Vehicles › Division 2 - Department of the California Highway Patrol › Chapter 2 - Lighting Equipment › Article 22 - Warning Lamps › Section 817 - Photometric Test Requirements

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
The luminous intensity of warning lamps tested as specified
					 in Article 4 of this subchapter, with a reaim tolerance of ± 0.5 degree
					 vertical and ± 1.0 degree horizontal allowed at each test point, shall
					 be as follows:
(a) Steady-burning
				  Warning Lamps. Steady-burning warning lamps, and flashing warning lamps which
				  alternate between on and off by electrically controlling the current supplied
				  to the lamp, shall meet the requirements in Table I. The photometric output of
				  flashing lamps shall be reported only while the lamp is on. Warning lamp units
				  shall be aimed for this test so the maximum intensity is on the H-V axis.
				  Warning lamp assemblies shall be mounted for this test in accordance with
				  Section 657.
TABLE I. MINIMUM CANDELA FOR STEADY-BURNING WARNING
					 LAMPS AND FLASHING WARNING LAMPS WHICH ALTERNATE BETWEEN ON AND OFF BY
					 ELECTRICALLY CONTROLLING THE CURRENT
Test point
								coordinates
Class A
								Lamps
Class B
								Lamps
Class C
								Lamps
Class D
								Lamps
Vertical
Horizontal
Red
Red
Yellow
Blue
Red
Yellow
Blue
Red
5L
15
20
50
10
10
25
5
5
10U
V
15
50
125
25
25
65
13
12
5R
15
20
50
10
10
25
5
5
20L
10
20
50
10
150
375
75
5
10L
25
50
125
25
300
750
150
12
5L
50
100
250
50
300
750
150
25
5U
V
80
150
375
75
300
750
150
40
5R
50
100
250
50
300
750
150
25
10R
25
50
125
25
300
750
150
12
20R
10
20
50
10
150
375
75
5
30L
--
--
--
--
30
75
15
--
20L
30
30
75
15
180
450
90
10
10L
300
75
190
38
400
1,000
200
15
5L
500
200
500
100
500
1,250
250
500
2 1/2L
2,000
--
--
--
--
--
--
1,500
H
V
3,000
300
750
150
600
1,500
300
3,000
2 1/2R
2,000
--
--
--
--
--
--
1,500
5R
500
200
500
100
500
1,250
250
500
10R
300
75
190
38
400
1,000
200
15
20R
30
30
75
15
180
450
90
10
30R
--
--
--
--
30
75
15
--
30L
--
--
--
--
30
75
15
--
20L
10
20
50
10
200
500
100
5
10L
25
50
125
25
300
750
150
12
5L
50
100
250
50
450
1,100
275
25
5D
V
80
150
375
75
450
1,100
275
40
5R
50
100
250
50
450
1,100
275
25
10R
25
50
125
25
300
750
150
12
20R
10
20
50
10
200
500
100
5
30R
--
--
--
--
30
75
15
--
5L
15
20
50
10
40
100
20
5
10D
V
15
50
125
25
40
100
20
12
5R
15
20
50
10
40
100
20
5
NOTE: Maximum anywhere in yellow shall not exceed 4,000 cd
					 over any area larger than that generated by a radius rotated 0.25
					 deg.
(b) Revolving Warning
				  Lamps. Revolving warning lamps shall meet the requirements in either Table II
				  or Table IV with the required test voltage applied to the input terminals of
				  the complete assembly. A revolving lamp that is designed to project a signal
				  throughout a 360 degree horizontal angle shall be tested with the lamp assembly
				  turned about its vertical axis to the location where the maximum candela
				  reading from the optical unit is reduced the most by any variations in density
				  or shape of the transparent cover or by obstructions in the lamp assembly. A
				  revolving warning lamp that does not project light through a 360 degree
				  horizontal angle shall comply photometrically about those axes straight to the
				  front, sides, and rear of a vehicle to which the lamp is designed to provide a
				  warning signal. As the lamp rotates, the full projected area of the reflector
				  of each light unit shall be visible along the beam axis as the center of the
				  beam moves from 20 degrees left to 20 degrees right of the device axis.
TABLE II. MINIMUM CANDELA FOR REVOLVING WARNING
					 LAMPS
Test point
								coordinates
Vertical
Horizontal
Red
Yellow
Blue
7.5U
V
50
130
25
5U
V
500
1,250
250
2.5U
V
3,000
7,500
1,500
H
V
5,000
12,500
2,500
2.5D
V
3,000
7,500
1,500
5D
V
500
1,250
250
7.5D
V
50
130
25
(c)
				  Oscillating Warning Lamps. Oscillating warning lamps shall meet the
				  requirements in Table III with the required test voltage applied to the input
				  terminals of the complete assembly.
TABLE III. MINIMUM CANDELA FOR OSCILLATING WARNING
					 LAMPS
Test point
								coordinates
Vertical
Horizontal
Red
Yellow
Blue
7.5U
V
50
130
25
5U
V
500
1,250
250
2.5U
V
3,000
7,500
1,500
20L
500
1,250
250
10L
1,200
3,000
600
5L
3,300
8,250
1,650
H
V
5,000
12,500
2,500
5R
3,300
8,250
1,650
10R
1,200
3,000
600
20R
500
1,250
250
2.5D
V
3,000
7,500
1,500
5D
V
500
1,250
250
7.5D
V
50
130
25
(d)
				  Gaseous Discharge Warning Lamps. Gaseous discharge warning lamps shall meet the
				  requirements in Table IV with the required test voltage applied to the input
				  terminals of the complete assembly. Lamps producing 360 degree light output
				  shall be rotated in the photometric test to the point where the lowest H-V
				  reading is recorded, at which location the lamp shall meet the flash energy
				  requirements. The candela-seconds shall be reported as the average for ten
				  consecutive flashes.
(e)
				  Alternative Technologies. Nothing in this standard shall be construed to
				  prohibit the use of any appropriate technology for light sources provided the
				  appropriate photometric and other requirements for the type of lamp are met.
				  Steady-burning warning lamps, and flashing lamps which alternate between on and
				  off by interrupting the electrical current to the lamp, shall meet the
				  photometric requirements of Class A, B, C or D as shown in Table I. Warning
				  lamps which approximate or simulate the appearance of revolving warning lamps
				  shall meet the photometric requirements of Table II. Warning lamps which
				  approximate or simulate the appearance of oscillating warning lamps shall meet
				  the photometric requirements of Table III.
(f) Removal from Service. Any warning lamp
				  assembly which noticeably fails to function properly shall be removed from
				  service. Warning lamp assemblies which utilize multiple light sources shall be
				  removed from service if any individual light source fails to function properly.
TABLE IV. MINIMUM CANDELA-SECONDS FOR GASEOUS
					 DISCHARGE WARNING LAMPS
Test point
								coordinates
Vertical
Horizontal
Red
Yellow
Blue
7.5U
V
5
12
3
5U
V
10
25
5
2.5U
V
30
75
15
20L
5
12
3
10L
12
30
6
5L
33
82
17
H
V
50
125
25
5R
33
82
17
10R
12
30
6
20R
5
12
3
2.5D
V
30
75
15
5D
V
10
25
5
7.5D
V
5
12
3
NOTE: The L and R test points do not apply to 360-deg
					 lamps.
1. Amendment
					 filed 11-25-2002; operative 12-25-2002 (Register 2002, No.
					 48).
Note: Authority cited: Section
						26103,
						Vehicle Code. Reference: Sections
						24012 and
						26103,
						Vehicle Code.