Quick update to the OP.My 22 SEL Convenience Premium package Tucson comes with a traditional incandescent light, and it's super dim in the cargo area. I think possibly all models come with this, a strange omission considering how many LED's there are on this thing.
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I purchased these lights based on a Facebook post, they fit, and are a HUGE upgrade in the amount of light in the cargo area. Not blinding, not a weird color, they match everything else on the car perfectly! Replacement is easy, just use a trim tool or small blade screwdriver to pop out the light module, then pop off the white cover. It's a 31mm Festoon light that does not matter for polarity.
Seriously, 5 minutes tops for less than $15, super easy upgrade.
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Insert your pry tool on the long edge. The assembly will pop out at the top.
Unless you are working with the liftgate down and the light off, that sucker will the HOT when you first pop it out. Ask me how I know. Disconnect the wiring and let it cool down.