Then applying Julio's argument to the «higher
temperature earth — i.e., to the earth at
temperature T2», won't the T2 earth behave like the
T1 earth in that won't «Iout» for the T2 earth be
equal to «0.8 * Iup» of the T2 earth, with the result that the T2 earth's
temperature will rise approximately the same amount as the
T1 earth's
temperature rose to equalize the 20 % of the energy «trapped» by the glass?