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+// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION 
+
+// PART IV : UTILIZATION AND TRACTION
+// CHAPTER 4: ILLUMINATION
+
+// EXAMPLE : 4.8 :
+// Page number 758
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+b = 15.25     // Breadth of workshop(m)
+l = 36.6      // Length of workshop(m)
+no = 20.0     // Number of lamps
+P = 500.0     // Power of each lamp(W)
+n = 15.0      // Luminous efficiency of each lamp(lumens/watt)
+df = 0.7      // Depreciation factor
+cou = 0.5     // Co-efficient of utilization
+
+// Calculations
+lumen_lamp = no*P*n                // Lamp lumens
+lumen_plane = lumen_lamp*df*cou    // Lumens on the working plane
+I = lumen_plane/(l*b)              // Illumination(lm/sq.m)
+
+// Results
+disp("PART IV - EXAMPLE : 4.8 : SOLUTION :-")
+printf("\nIllumination on the working plane = %.1f lm per sq.m\n", I)
+printf("\nNOTE: ERROR: The breadth should be 15.25m but mentioned as 5.25m in textbook statement")