Hey Critter,
You looking at Jigs ranging anywhere from 20 grams to 200 grams in some cases.... depdning on your application....
Ultalight or Light jigging is more about the rod/reel/line combo in my opinion than the jig weights...
These modern rods can handle an enormously wide range of jig weights, so one is not just limited to a really light jig...
I like jigs to get down quickly, so I am usually fishing 80 to 200 grams, unless in very shallow water, when then 60 and 40 gram models are the way to go...
I love the little SW Labs Metal Leaf Jigs, The SW Labs Spearhead Jigs are amazing,and the smaller sizes of the SW Cuttlefish. I also really like those new Sea Iron Pelacus Jigs/Spoons cause they can be cast and jigged equally well....
Of course the Squidie Jigs which should be in everyones box I think, work really well on this gear too.....
Hope that helps..