A low-pressure mercury-vapor lamp has a characteristic emission line at 253 nm. Knowing that this lamp is putting out 11.8 watts of light energy, how many mercury atoms are emitted per second during operation?

• A. 7.86x10^-19 Hg atoms/s
• B. 4.73x10⁵ Hg atoms/s
• C. 1.50x10¹⁹ Hg atoms/s
• D. 1.50x10²⁸ Hg atoms/s
• E. 9.27x10^-18 Hg atoms/s