【多选题】
A be white
B be capable of operating continuously for at least 12 h with a luminous intensity of not less than 4.3 cd in all directions of the upper hemisphere
C if the light is a flashing light it shall flash at a rate of not less than 50 flashes and not more than 70 flashes per min for the 12 h operating period with an equivalent effective luminous intensity.
D be fitted to provide illumination for not less than 12 h to permit reading of survival and equipment instructions
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