They might be a little brighter than regular halogen bulbs, but not like "h0ly crappzz deez tings is BRITE!" The cool thing about these bulbs is that they give off a white light, which probably makes them a little brighter, but like I said, not a huge difference. It's just the color that's cool.
If I can find an old stock bulb, I'll do a side by side comparison of these and the stock bulbs tonight in the map lights if you want me to.