/diy/ - Do It Yourself

A while ago I started a thread asking for ideas to have more light under a car in garage.
People suggested I should start with a white (or light colored) flood.
A few weeks later I have a nice perfectly white floor with epoxy on top (I can't believe how easy is to clean any dirt from it)

Next step is the lights themselves.
I decided to go with LED strips (with some rudimentary reflectors to make sure most of the light goes down/sideways and not up)

Searching for some info, I'm lost.
Most google/youtube results either talk about things I don't care about like remote control, color, adhesive or are obviously advertisements (shills??)

All I want to know is which strip is the brightest under $10/piece (15ft or 16.4ft).
Help?