Cargo light ... We all know that the cargo area light on the RAV4 is weak. (It might help to know that most CUV's have the same problem.)
For the cargo area, unlike many other lights, it can only ever be on when the hatch is open. That only happens when the car is stopped, so it's okay for it to be BRIGHT back there. Unlike the map or dome lights, there's no concern about a passenger turning on the light while driving at night...
On the 2016, this light is a 194 bulb (wedge style, not a festoon.)
Replacing the incandescent with one of the 194 replacements from the autogoody kit helped, but it was still weak. LED's are directional, and only 2 of the LED's are facing the lense, and the rest are all pointing inside the wall of the car. Lining the inside of the mount with aluminum foil (to make a reflector) helped more, but it was still weaker than I wanted.
The space available directly on the clear cargo area light lense is approx 36mm x 26mm. I found the PERFECT panel on amazon that has 18 5050 LEDs and measures approx 34mm x 20mm. It's one of those that has adapters for t10 or festoon connectors.
This thing is extremely bright. 5050 LEDs are pretty bright to start with, and 18 of them on a panel is enough that you will see spots if you stare at it for more than a couple seconds.
After pulling the light out of the cargo area (disconnecting the assembly from the car harness), I popped the plastic cup-like thing off (which you have to do to get to the T10 connector anyway.) I put the panel directly against the lense, attached the adapter and plugged the T10 in. I then pushed the plastic cup-like thing back on and it holds the LED panel in place enough to push the assembly back into the car. Once the entire assembly is pushed back into the car, everything is held in place securely, and it works great.
(There's a picture of the 2016 assembly without that cup-like piece in this post:
http://www.rav4world.com/forums/124-4-4-interior/191482-let-there-light-7.html#post2042825)
This may work for pre-2016 cargo areas (as it has a festoon adapter), but I don't know if the panel would physically fit in the space on those cars. For the 2016, it's perfect.
Here's a link to the panel I ordered:
Amazon.com: uxcell Vehicle White 18 LED Panel 5050 SMD Dome Light + T10 BA9S Festoon Adapter: Automotive
Edit: I went to take some photos of the panel and only then realized that I was sent the wrong LED panel. Instead of an 18 LED panel, I have a 15 LED panel. Even still, it's plenty bright...
I'm attaching two photos. One shows the panel through the lense while its mounted in the car. The other tries to show how it's sandwiched between the lense and that plastic cup-like thing...