RESULTS OF THE INVESTIGATIONS 



Part I — Light Intensity and Daily Light Dosage 



Two daily light dosages of 12 and 24 hours were compared, as well as 

 light intensities of IS. 60 and 120 foot candles. In two of the three experi- 

 ments, a group with natural light was added in order to compare the con- 

 trolled artificially lighted groups with natural light. 



Effect Upon Body Weight 



Table 1 gives the average 10 week body weight based on an equal number 

 of each sex for three replicates in each experiment, the average for each 

 of the three experiments, and finally the average of the three experiments. 

 Based on the average of the three experiments the heaviest birds were the 

 24 hours, 15 foot candles group with an average of 3.31 pounds; followed 

 closely by the natural light group with 3.30 pounds. The lightest were the 

 24 hours, 120 foot candles group with 3.22 pounds. The differences between 

 the 12 and 24 hour dosages were extremely small, ranging from .02 pounds 

 for the 15 foot candles; .01 pounds for the 60 foot candles; .03 pounds 

 for the 120 foot candles; with the 12 hour dosage being the heaviest in all 

 cases. 



Table 2. The Effect of Light Intensity and Daily Light Dosage Upon Feed 

 Conversion to 10 Weeks of Age. 



* Two Experiments only 



Light Dosage Average: 12 Hours 2.61; 24 Hours 2.64 



Intensity Average: 15 Foot Candles 2.64; 60 foot Candles 2.61; 120 Foot Candles 2.61 



7 



