How about these? Just under 16” long and with built in heat sinking. These are made with much thicker PCBs than most boards for heat dispersion and diode life. Maybe that appeals as an engineer especially for DIY stuff you want to keep and reuse?
One on each shelf at a max 85w each, made for controllers to do sunrise/sunset and adjustable spectrum too! @Baudelaire is good with support too, but these are pretty plug and play for someone of your technical skill.
If you message him to talk about a setup he might let you at the Black Friday code early, it’s about time for it to drop anyways at the end of November