Offset dual LED strip bar (made for Ender 3, but should work on any printer with a 20mm top crossbar)

thingiverse

Make sure you align this so the print head won't hit your bed clips! I scoured plenty of LED strip bars for the top of my Ender 3, but none had any kind of offset. Most of the action happens well in front of the gantry, making it only logical to move the lights forward. I also tapered the channels where the LED strips stick to, pushing the light more toward the center instead of straight down. Clearances on both sides allow wires to run into the channels of the crossbeam. Two M3x12 screws and 2 slot nuts that came with the printer held everything in place.