What I've done when replacing the 921 incandescent bulb for the equivalent LED wedge base bulb in the stovetop vent; I put a piece of aluminium tape beyond the bulb to reflect maximum light. Tremendous effect.
Dont try this with the incandescent bulb, it will melt the plastic housing
I have only switched out a few of my bulbs on my '03 Surveyor. The porch light was the same as the overheads that I replaced. Didn't look at the stove vent yet. Used 13 led bulbs and they are at least as bright as the incandescent ones that I removed.