A Practical Method to Design Reflector-Based Light-Emitting Diode Luminaire for General Lighting

Table 1

The coefficients of the polynomial function, the ratio of to , and the value of parameter .

Parameter
Value	a0 = 0.9778; a1 = 0.05183	4.89	13°
	a2 = -0.2492; a3 = -0.05671
	a4 = 0.0346