I grow some species and hybrids in this section with almost full sun this time of year, but for anosmum the Bakers recommend 2000-3000 fc which is more like dappled light or bright shade.
Any balanced water-soluble fertilizer, used in fairly dilute concentration, should suit anosmum fine. I've used Dyna-Gro or MSU for several years and I'm in the process of switching to Ray's K-Lite formula. With most orchids I shoot for 100-150 ppm N applied weekly, but for heavy feeders I either apply more often or supplement with slow-release granules in the pot/basket. Since anosmum benefits from reduction and then elimination of fertilizer starting in fall and winter, it's best to use granules sparingly and remove any remaining ones in the fall. Hope this helps!
--Nat