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

Asghar Ali Mian. (1987) Light requirements of the laying hsn under intermittent lighting system, , Volume 24, Issue 3.
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