10.4 Common tests for all position-indicating lights (additional lights
are required to carry out the environmental tests.)
10.4.1 Vibration Test
Regulations: IEC 945 : 3rd edition (Nov. 1996), paragraph 8.7
One unit shall be subjected to a vibration test according to IEC 945 : 3rd
edition (Nov. 1996), paragraph 8.7.
The lights shall function after the test.
10.4.2 Mould growth test
Regulations: LSA Code 18.104.22.168
One unit should be subjected to the mould growth test.
(Note: The mould growth test may be waived where the
manufacturer is able to produce evidence that the external materials employed
will satisfy the test.)
The light shall be
inoculated by spraying with an aqueous suspension of mould spores containing
all the following cultures:
Scopulariopsis brevicaulis; and
Trichoderma viride. The
light shall then be placed in a mould growth chamber which shall be maintained
at a temperature of 29 °C + 1 °C and a relative humidity of not less than 95%.
The period of incubation shall be 28 days.
After this period
the light shall be inspected.
The light shall be rot-proof and not be unduly affected by fungal attack.
There shall be no mould growth visible to the naked eye and the light shall
function after the test.
One unit shall be subjected to the switch arrangement test. A person,
wearing immersion suit gloves, must be able to switch the light in its normal
operational position on and off three times.
The light must function properly.
10.4.4 Corrosion and seawater resistance test
One unit shall be subjected to a corrosion and seawater resistance test
according to IEC 945 : 3rd edition (Nov. 1996), paragraph 8.12.
.1 If there
are no exposed metal parts the Corrosion and Seawater Resistance Test need not
.2 The Corrosion and Seawater
Resistance Test may be waived where the manufacturer is able to produce
evidence that the external metals employed will satisfy the test.)
There shall be no undue deterioration of metal parts and the unit shall
10.4.5 Solar radiation test
(not for survival craft interior and lifejacket lights)
One unit shall be subjected to a solar radiation test according to IEC 945 :
3rd edition (Nov. 1996), paragraph 8.10.
(Note: The Solar Radiation test may be waived where the manufacturer is able
to produce evidence that the materials employed will satisfy the test, i.e. UV
The mechanical properties and labels of the unit shall be resistant to
harmful deterioration by sunlight. The unit shall function after the test.
10.4.6 Test for oil resistance (not for
survival craft interior lights)
One unit shall be subjected to the Oil Resistance test according to IEC 945
: 3rd edition (Nov. 1996), paragraph 8.11.
After this test the unit shall not be unduly affected by oil and shall show
no sign of damage such as shrinking, cracking, swelling, dissolution or change
of mechanical qualities. The light shall function after the test.
10.4.7 Rain test, and watertightness
One unit shall be subjected to a rain test according to IEC 945 : 3rd
edition (Nov. 1996), paragraph 8.8. After having passed the rain test, the
unit and the complete power source shall be immersed horizontally under not
less than 300 mm of fresh water for at least 24 h.
The unit shall comply with the requirements of IEC 945 : 3rd edition (Nov.
1996), paragraph 8.8.2, and shall function after the rain test. Additionally,
after the water-tightness test the unit shall function and there shall be no
evidence of water inside the unit.
10.4.8 Fire Test (not for Survival Craft Interior Lights)
One unit shall be subjected to a fire test. A test pan at least 30 cm x 35
cm x 6 cm shall be placed in an essentially draught-free area. Water shall be
put in the bottom of the test pan to a depth of not less than 1 cm followed by
enough petrol to make a minimum total depth of not less than 4 cm. The petrol
shall then be ignited and allowed to burn freely for at least 30 s. The unit
shall then be moved through the flames, facing them, with the unit's light not
more than 25 cm above the top edge of the test pan so that the duration of
exposure to the flames is at least 2 s.
The unit shall not sustain burning or continue melting after being totally
enveloped in a fire for a period of at least 2 s and after being removed from
the flames. The unit shall function after the test.
10.4.9 Measurement of luminous intensity
If the voltage at five minutes of operation is lower than the recorded
voltage at the end of life it is permissable to use a lamp from the same build
standard for the light output test. Using the lowest recorded voltage a light
output test can be carried out as described below. The voltage of the
specified number of test units should be monitored continuously for the
specified time. To make sure that all the test units provide a luminous
intensity of not less than the specified luminous intensity in all directions
of the upper hemisphere after the specified time of operation, the following
test shall be performed.
It must be
demonstrated that at least one light from each of the specified temperature
ranges reaches the required luminous intensity in all directions of the upper
hemisphere when using a photometer which is calibrated to the photometric
standards of the appropriate National or State Standards Institute. (Note: CIE
Publication No. 70 contains further information.) The lowest voltage light of
the cold temperature test sample lot, the highest voltage light of the high
temperature test sample lot and the mean voltage light of the ambient
temperature sample lot should be selected. These three lights must be used for
the light output tests. In the event that a lamp filament burns out during the
light output test, a second light from the same performance test lot may be
Luminous intensity should be
measured by a photometer directed at the centre of the light source with the
test light on a rotating table. Luminous intensity should be measured in a
horizontal direction at the level of the centre of the light source and
continuously recorded through a 360 degree rotation. These measurements should
be taken in the azimuth angles at 5 degree intervals above the horizon up to
the single measurement at 90E, (vertical). Luminous intensity should then be
measured in a vertical direction, beginning at the centre of the light source
at the point of lowest recorded light output, and continuously recorded
through an arc of 180E.
The test lights shall continue to provide a luminous intensity of not less
than the specified intensity in all directions of the upper hemisphere for a
period of at least the specified time. All measured data of luminous intensity
and voltage shall be documented. In the case of a flashing light, it shall be
established that the rate of flashing for the specified operating period is
not less than 50 flashes and not more than 70 flashes per minute and that the
effective luminous intensity is at least the minimum specified intensity in
all directions of the upper hemisphere. The effective luminous intensity is to
be found from the formula:
I is the instantaneous intensity, 0.2 is the Blondel - Rey constant and
are time-limits of integration in seconds.
Flashing lights with a flash duration of not less than 0.3 s, not including
incandescence time, may be considered as fixed lights for the measurement of
luminous intensity. Such lights shall provide the required luminous intensity
in all directions of the upper hemisphere. (Incandescence time is the time
interval between switch on and the luminous intensity reaching the required
minimum luminous intensity.)
One unit shall be tested for chromaticity to determine that it lies within
the boundaries of the area "white" of the diagram specified for each colour by
the International Commission on Illumination, (CIE). The chromaticity of the
light shall be measured by means of colorimetric measurement equipment which
is calibrated to the appropriate National or State Standards Institute. (Note:
CIE Publ. No. 15.2 contains further information.) Measurements on at least
four points of the upper hemisphere shall be taken.
The measured chromaticity coordinates should fall within the boundaries of
the area of the diagram, as per CIE. The boundaries of the area for white
lights are given by the following corner co-ordinates:
(International standard on Colours of Light Signals, with colour tables to
be developed by CIE.)