Subject: How long lasts the jump of electron from one energy level to another?

When a gas for example is heated enough, the electrons do jump to higher 
energy level in atoms. When they return back to lower level they emit 
photon. How long is the time required for this transition from level to 
level? Where does the electron lurk between this time, if the time required 
for jump is finite? Is it possible to measure or theoretically predict that 
time? Is this question insensible just because I am thinking electron some 
odd way and do not understand it's nature right?

Re: How long lasts the jump of electron from one energy level to another?