I was wondering if you guys had any tips for filming dark scenes, like caves, a creepy house at night, etc.. to produce good raw footage. do most people use lots of lighting, and then make it dark in the editing process? any advice appreciated

IMHO the best thing to do is use lots of lighting and use the camera.

More light gives you the ability to adjust the aperture accordingly, and highlight areas of interest or stylise the shot. This can give (in my opinion) a really nice contrasting image with very dark backgrounds and well exposed subject/textures.

But It all depends on the look you are going for.

Moved - this is a good creative tpye of question.

I quite like the grungy look of dark scenees shot with lots of camera gain, but also twek the footage in post, often adding more blue.

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I'd say it's best to use a lot of light and then stop it down. I assume you use a monitor with your camera?

I interpret this as meaning "more sources of light at different levels of output'. And I think you have hit the solution on the head

When I've been shooting dark scenes, I always use a lot of lights, then adjust the aperture accordingly, if you want some of the grainy effect that gaining has, then you can always apply that in a video filter in post