Appleton, Skokie, Ill., now offers free access to its CalcMaster lighting software on the Web at www.appletonelec.com.

Based on the popular zonal cavity method that allows you to do simple lighting layouts, the CalcMaster program helps you determine the number of fixtures needed (given a desired average illuminance) and the average illuminance (based on a set number of fixtures).

To access CalcMaster, register at www.appletonelec.com — a process that takes less than 5 min. For more information, contact Appleton at (847) 679-7800.