Which of the following lamps is the 'cheapest for the same wattage ?
A. Fluorescent tube
B. Mercury vapour lamp
C. GLS lamp
D. Sodium vapour lamp
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Answer: C
Share your understanding of this question with the correct explanation.
Which of the following lamps is the 'cheapest for the same wattage ?
A. Fluorescent tube
B. Mercury vapour lamp
C. GLS lamp
D. Sodium vapour lamp
Answer: C
Share your understanding of this question with the correct explanation.