Ok bench2 I have come up with 2 different sceniors for you.
1) CCFL's come with 2 tubes per set right?? & they are in-expensive..
Soo you get 2 sets of them...
Set 1 install under-dash ,1 tube on each side of center & wire it to the drivers side door switch.. This way when that door is opened.. BOTH sides of your floorboards will light up!
Do the same for your second set.. One tube on each side of center..Wire it to the pasanger side switch.
When the passanger side is opened.. BOTH sides of the floorboards light up!
When BOTH DOORS are opened, the floorboards will light up really bright as all 4 tubes are now glowing... now onto second solution
2) Go with the more expensive LEDs..( strips or bundles) & wire them to your dome light..
They will work with the dome & dim & fade out when supposed to.
I changed out my dome to LEDs & they work perfectly..
PLUS.. I noticed... then when i approached my car this morning & hit the 'un-lock' with the key fob remote.. the car un-locked AND... the blue dome lights came on as well!!.. I never noticed that before... pretty cool, I thought...
good luck... jh