Chemistry-Could you glow in the dark?

100W/1.35 MeV = 4.62 � 10^14 disintegrations per second required to light a 100 watt bulb. For a 70 kg human, K-40 disintegrates at the rate of 266,000 atoms per minute, or 4,433 per second. 4.62 � 10^14/4,433 = 104,285,820,603 people to light up a 100w light bulb from the decay of K-40 in their bodies.