system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Are there consistent rules for Darkforce and Lightforce?

I especially want to know about Darkforce since the powers seem to change per character. All I know is that their powers come from an alternate dimension. Cloak, Dagger, and Mr. Negative got their powers through drug experimentation. Others seem to gain them through exposure to radiation. Has Marvel said anything about what the forces really are?
gpt
Darkforce is most well-defined so far. It indeed can bestow many different kinds of powers, but generally it can be narrowed down into providing abilities related to teleportation, power drain and darkness. 

"Lightforce" is more nebulous term, mostly relating to powers exhibited by Dagger and Mr. Lee, a good side of Mr. Negative. Most obvious are Dagger's powers of light projection, which are quite potent, enough to light up whole Manhattan like a tiny sun.