Solid Scope for Hog Hunting

[Spool]

I have a general question about hunting with 1-4, 1-6, or similar scopes. The rule of thumb for light transmission for all optics is the larger the objective/magnification ratio, the more light you get. These lower power scopes have such small objective lens, how can they work well in low light?

Also to add.

Increasing magnification decreases light, lower mags don't need as much light as a high mag

So the question ends up being what is good enough for your application from a size / weight basis / light / mag basis.