Get the flex light for $15 from here:
https://www.diodedynamics.com/trunk-...ubaru-brz.html
This is what it did for me. It's a long LED strip with a sticky backing that you can adhere to the ridge running across the interior of the trunk up top. Benefit to an LED strip is that any one item is unlikely to block all of the light, since it's like over a foot long.