A bulb is rated at 150 watt, converting 8% energy into light. If energy of one photon is 4.42 10 -19 J, how many photons are emitted by the bulb per second?

1. A. 27.2 10 19
2. B. 4.06 10 19
3. C. 1.35 10 19
4. D. 2.71 10 19

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