The rendered image shows too much light, so it looks washed out or faded.
Issues and Solutions: To solve the problem, try the following:
Examples: For a 100 watt tungsten incandescent (110 V), efficacy is 175. For a 32-watt fluorescent tube (T8), efficacy is 60.
After changing the Efficacy value, render the image again. Try adjusting the Efficacy value until you achieve the desired result in the rendered image.