It feels like the interior cell that your house uses is set to outside lighting, not the warm interior lights. I want the fire to look warm and welcoming like Breezehome, not all washed out and weird like it looks right now. Is this a bug? If so, PLEASE fix it.

I know this is one of the things that bugs me about Skyrim.

Its just like when you go into your house in Solitude during the NIGHT (when its dark) and its brighter then the sun inside. WHERE IS THE LIGHT COMING FROM?

Or... when in my newly built house from Hearthfire DLC I put some wall candles in the completely dark celler and the candles give off light but it does not show on the walls or anything else.

I noticed this as well. It seems like only a quarter or so of the light sources are actual light sources. My house seems far darker than it should be.

In case anyone's curious:
Falkreath house (fully furnished)
Bedrooms
Storage room
Armory

That would probably be for performance reasons.

I figured that, but it still bothers me that I have to walk around with a lit torch in my own house...

I don't care why, I just hope it's fixed.

Unfortunately you would care if you had sub-par framerates within. It's obviously been done for a reason as that's not the default lighting template within a cell.