Abstract
A series of three short term trials were carried out to quantify
light requirements, by defining both the duration and frequency of
light pulses, necessary for maximum egg production. The investi-
gations were confined to an 8 hours (h) period, while the remaining
16h were equally divided into 8h continuous tight and 8 h dark
period. it was found that eight 1-minute pulses spaced at hourly
intervals supplied before or af.er an 8 bh photoperiod induced maxi-
mum stimulation in laying hens. Reducing the duration of 1-minute
pulse to lOseconds or redecing the fiequency to one every two hours
gave a significantly lower rate of lay. 7
