To get a good cross section it would look to me like you would need 9 groups of laying hens. All raised in the same flocks and picked at random for the experiment. 3 groups of pullets, 3 groups of 1 year old hens, and three groups of 2 year old hens. Each of these 3 age classes would be subdivided into a CFL lighted flock, an incandescent lighted (UV) flock and a flock with no supplemental lighting. To iron out the differences in molting behavior the experiment would need to run for 365 consecutive days.
To make the cheese more binding it would also be nice to do the same experiment with 3 or 4 different laying breeds or strains, all in the same years and location to even out the total hours of daylight and darkness. That's too much to me like being a real chicken farmer again, PM me with your findings..
http://en.wikipedia.org/wiki/Forced_molting
http://en.wikipedia.org/wiki/Animal_husbandry