I used 12” LED strips that I bought from Amazon. Come in packs of 4 and pretty reasonably priced. They can be cut to length as well. I put them under dash on both side as well as under both seats.
Amazon.com: PryEU Daylight White 6000K LED Strip Lights 12V for Interior Car Automotive Boats Motorcycle Lighting 12'' 30CM 2835 SMD UL Listed Pack of 4: Home Improvement
I tied them into my ECU and operate the same as the dome lights when door opens/closes, alarm on/off. I used interrupter switches to be able to turn them off as needed. Make such a huge difference, I really like a lot of light.
Mounted under each front seat
Added some disconnects to use as needed.
Floor well and under seat Lighting
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My build thread https://www.toyota-4runner.org/4th-g...ml#post3520544
2008 Titanium Metallic 4WD 4Runner V6 SR5| Satoshi Grille mod|17x8 Level 8 MK6 wheels, 275/70/17" Falken Wildpeak tires| Front-Bilstein 5100's set at 0 with ToyTec branded Eibach silver springs and 1/2" ToyTec spacer driver side, 1/4" ToyTec spacer passenger|Front Diff. drop spacer kit|sway bar relocate kit| Rear-Fox 2.0Resi and ToyTec superflex black springs|Tyger Bull bar with LED's/Lund HX tube side steps
2021 Subaru Crosstrek Limited in Crystal White Pearl