The luminous efficiency of the high-pressure mercury vapour lamps rang – McqOptions

MCQOPTIONS

1.	The luminous efficiency of the high-pressure mercury vapour lamps ranges from:
A.	30-40 lumens/W
B.	60-100 lumens/W
C.	100-150 lumens/W
D.	250 lumens/W
Answer» B. 60-100 lumens/W

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