Intense pulsed light is a great technology for reducing brown spots from sun and reducing small visible blood vessels. It can be used for hair reduction, but there are better technologies for that. Specific lasers of the appropriate wavelength are much better at destroying hair follicles. Use the best technology available for the desired purpose.
Using IPL for hair removal is a bit old school. Though it works, it is minimally effective compared to diode lasers, Alexandrite lasers, and other new, faster options. IPL is slow and tedious for the patient and the technician. IPL is attracted to color (red, brown, black) so that's why it works for various things, but the settings are different depending on what you're trying to treat (skin vs. hair).