Physics · Illumination
एक सामान्य फ्लोरोसेंट लैंप की चमकदार दक्षता (luminous efficiency) लगभग कितनी होती है?
- 130 lumen/watt
- 240 lumen/watt
- 360 lumen/watt✓
- 470 lumen/watt
सही उत्तर देखें
60 lumen/watt
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