L = area x emission per unit area
  = 4p R2 sT4
L, T, & R : any 2 determine the 3rd
    double R and L increases by factor of 4
    double T and L increase a factor of 16
How much power radiated by YOU ?
Body about 35C area 6ftx2.54x 12x 2x 2.54 x 12