sirs: with regards to the nightsun on ifr ships, we are working with AEC on the stc for the ec-145 ifr (as seen at HAI) for suffolk county.
flying bull is correct, the flight testing is much more extensive for IFR operations, not just for effect on instruments but also basic handling charactersitics, neutral stability etc (sx-16 turned sideways is a flying garbage can)
with all of our stc for nightsun mounts, this is our first for an IFR cert airframe. in addition, the nightsun should remain off during IFR operations, at least until visual contact is made with the ground. in addition, at that point the sx-16 is nothing more than a very high powered landing light
p.m. us, should have rfm available later this month for ec-145
cal meeker