Jig weight

[dubyatee]

I'm kinda confused about what jig weight i should be using. I've always heard that a heavy jig causes a reaction strike since it falls so quickly. But in darker water, wouldn't you want a lighter jig so the bass can see it longer? I use heavy jigs to punch through grass but what about pitching into sparse weeds and wood? I'm curious to what everybody thinks and what yall typically throw. Any info on this would be appreciated. Thanks