So did I, so I took one to bits.
Photo album: https://photos.app.goo.gl/Ld5mwoHty3imsdpFA
The case appears to be injection molded ABS. There’s an Ethernet port, USB port, Weidmuller terminal block, Micro USB, and a fan. The case has some ventilation slots. Visible from the top are 8 SMD LEDs with focusing cones. On either side, the center two LEDs are slightly offset to the side. They look like these Cree XP-E2 LEDs. There’s a fairly large camera.
The case is held together with four T6 screws. The case unfolds with just a ribbon cable connecting the mainboard to the camera. There are three PCBs: the camera module, the LED board (labeled "Lime Light LED Board v3.2.2 20191104), and the mainboard (labeled "Limelight Mainboard rev3.20191104 B1).
No branding identifies the camera module, but it appears almost identical to this sainsmart one, except for a slightly different lens. This would mean an OV5647 sensor. This checks out with the limelight FPS specs, and the fact that the only officially supported CSI sensors are the OmniVision OV5647 and Sony IMX219.
Four two-pin headers connect the LED board to the mainboard. Again, I’m not exactly sure, but these LEDs look just like Cree XP-E2’s. Pairs of LEDs are driven by four identical LED driver circuits. The Diodes AL8860 LED driver chip is used. Also on this board are the status LEDs.
Taking off the LED board we can get a clear view of the mainboard. On the top are the four two pin sockets for connecting the LED board, as well as all the peripheral ports, and a connector for the 20mm fan. After unscrewing two loctite-d screws we can flip the mainboard out and the first thing we see is the brains: a Raspberry Pi Compute Module 3+. A DDR2 SODIMM connector like this one is used. Two more T6 screws are used to secure the compute module down. Pop the sides out, and the compute module folds up and out, exposing the rest of the board. I’m not experienced enough to say too much about the mainboard, but I can spot an Ethernet controller and some voltage regulation stuff. I’m guessing there’s not much to see here, just what’s necessary to power an RPI compute module off ~12v, use the camera interface, Ethernet, and USB, as well as some PoE stuff.