On Infinity, I managed to jar a bright, pure node. Obviously, with my luck, it was downgraded to normal. Seeing as the stabilizers have a chance to upgrade low quality nodes, is it possible for me to get my node upgraded to bright?
Also, should I care? Is there a difference in harnessing vis from a normal/pure/bright/whatever node?
I've heard that if they bully enough nodes they can be upgraded, but this isn't really something i've seen myself.
Stablisers can turn fading nodes into pale ones and remove unstable conditions from nodes (with the advanced one having a higher chance to do so), but they cannot say turn a pale into a normal.
You might try using a Primadorial Pearl on it, but 1. it's very unpredictable in what will happen, 2. you ought to do the research regarding nodes and pearls before trying, to improve your odds. Unless the node is huge I wouldn't bother seeing how rare and hard to get Primadorial Pearls are.
The brightness of a node determines how fast it recharges when drained (and does have an effect if you energise the node).
Fading Nodes don't regen vis at all. I'm not sure how this would interact with energisation, i've not tried.
Pale Nodes regen slower than usual.
And Bright Nodes regen faster than usual.
As to the types, only two actually affect the vis in the node.
Hungry Nodes eat blocks items and entities nearby. The aspects of what it eats are broken down into primals and can be used to embiggen the node. While dangerous, they can't eat Obsidian or other similarly tough materials, and a crafty thaumatargue can tame it to provide pretty much all the vis they'd ever need.
Unstable Nodes periodically lose vis capacity. When this happens it does produce an aspect orb.
For completeness:
Pure nodes protect against taint, and in a silverwood tree will convert the nearby land to magical forest.
Sinister nodes convert the nearby land to an Eeriee biome, spawn angry zombies, and are quite often found near places of interest to thaumatargues.
Tainted Nodes create taint around themselves, and make the biome Tainted Lands. Other nodes caught in a Tainted Lands biome can become Tainted themselves. (and this is usually a step in taming Hungry Nodes.)