Jerry Wass wrote:
Why does the diameter of the reflector have so much effect on the
output-(candlepower)--of bulbs having the same power input?? i.e.
#4509-PAR-36 4.45"Ø 110,000cp
#4537-PAR-46 5.70"Ø 200,000cp


The reflecting area is larger. 15.55 in^2 compared to 25.51 in^2