MIL-PRF-22885/111B
TABLE I. Illuminated color and luminance limits.
Minimum average
Color limits 1/
Color
Nominal peak
Color
luminance
code
wave length (nm)
x
y
(100 percent duty cycle) 2/
.304
.668
.318
.682
Red
RD
630
60 foot-lamberts
.267
.705
.719
.281
.465
.506
.479
.520
Amber yellow
AY
585
70 foot-lamberts
.589
.382
.603
.396
.324
.644
.338
.659
Lime green
LG
565
150 foot-lamberts
.499
.472
.513
.485
.252
.710
.266
.724
Green
GR
555
45 foot-lamberts
.395
.575
.409
.589
.613
.358
.627
.372
Orange
OR
610
70 foot-lamberts
.678
.294
.692
.308
.700
.272
.714
.286
Ultra red
UR
660
400 foot-lamberts
.713
.258
.733
.267
NVIS green B
JJ
553
In accordance with
40 foot-lamberts
MIL-L-85762 3/
NVIS yellow
KK
580
50 foot-lamberts
NVIS red
LL
607
8 foot-lamberts
1/ Corners of the x and y envelope limits from the CIE chromaticity diagram.
2/ With or without EMI/RFI shielding.
3/ Appropriate power modulation required to regulate LED illumination output.
EMI/RFI shielding: When applicable, the shielding efficiency test of MIL-PRF-22885 shall be conducted at
the frequencies and with the minimum attenuation requirements as specified below:
Electric
Minimum
Plane
Minimum
field
attenuation
wave
attenuation
150 kHz
60 dB
400 MHz
39 dB
500 kHz
60 dB
1 GHz
33 dB
1 MHz
60 dB
2.5 GHz
28 dB
10 MHz
60 dB
10 GHz
20 dB
Sunlight readability: Applicable to display type S switches. Units shall be tested for ∅1 = 45°C and ∅2 = 0°C
only. This procedure does not test readability in direct reflected specular sunlight (glare). The average
contrast ratio of each lighted legend character to the background shall be as specified in table II. In the
unlighted legend condition, the average contrast ratio of each legend character to the background shall have
an absolute value ≤ 0.1. The legend used for testing shall have a character height of approximately 0.09 to
0.1 inch. The stroke width shall be characteristic of each manufacturer's standard military product.
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