One day I'll get around to taking a photo, but what I did was similar. Same concept: remove the plastic panel from the hatch, tap some 14 gauge wire into the +/- of the existing (weak) lamp, run the wire to wherever you mount your lights.
COBs are usually far brighter than standard chip strips and they appear as a solid light tube instead of dot-blank-dot-blank.
Your lights look great, but I only needed to light my cargo area... not the entire neighborhood (just being silly - not mean). I just did a single strip across the interior at the top of the cargo opening.