I'm not sure what the little guys tankmates are, but if possible add foods that can be anchored and left so that you aren't tethered to a timer. Clams and oysters make great grazing feeders. Most recommend to cut off half the shell and let the animal feed at will, however that's not the best method. Crack the shell so there's exposure but not complete access. Your trigger will feed over a longer period of the day but also need to chew through the shell to acquire further access. The shell will not only prolong the feeding period but provide necessary calcium in it's diet. You can also use dried coral skeletons (hollow of course) and pack them with table shrimp, fillet or crab meat.
A second and equally important option is to include a feeding clip and a variety of nori.
As an added note, don't worry about feeding after the lights are out; let the little guy get it's rest.
Ed, Thanks for the excellent advice...have you noticed any changes in their coloration over the years?
I've had a few queens over the years and they're great fish.