The OE interior lighting is quite dim. For ~$25 / 10 minutes work, you can replace your map/dome lights with brighter LEDs.
Tools/parts needed (also replaced reverse lights):
3 x 3022-CWHP4 (SuperBrightLEDs) - your bulb may be different
Knife / Flathead Screwdriver
Use your knife / flathead to remove dome light cover:
Remove the two screws and disconnect power:
Replace with LED:
Reconnect power, reinstall dome light, and replace cover.
Use your knife / flathead to remove map light cover:
Remove the two screws, then disconnect power:
Replace the OE bulbs with LEDs:
Reconnect power, reinstall map lights, replace cover.
NOTE: The pictures were taken with just the dome lights, since that's what goes on when you unlock / open the door. When you turn the map lights on as well, the difference is even more drastic. The camera does not do the difference justice.