PAR64 = 64/8 = 8 inch = 20,32cm

       PAR56 = 54/8 = 7 inch = 17,5cm

       PAR44 = 44/8 = 5,75 inch = 14,5cm

       PAR38 = 38/8 = 4,75 inch = 12cm

       PAR36 = 36/8 = 4,25 inch = 10,8cm 

       Lensen

       VNS = Very Narrow Spot

       NS = Narrow Spot

       MF = Medium Flood

       WF = Wide Flood

       VWF = Very Wide Flood