I think it made a pretty drastic difference. Unfortunately, the 5 LED map light bulbs are basically covered by the housing. Only one LED is actually visible so the inside of my headliner is super bright. This is irritating. I'm sure I could cut the housing with a hobby knife, but at 9:30 last night I wasn't willing to do that. Please ignore the messy interior. What do you guys think?Additional photos in reply because mobile kinja hates me!