Design Concept:
I created this revision to a design from Anglesmith Customs (not sure if this is considered a remix, but I will credit it as such). I redrew this support and exported from FreeCad to help provide stronger lighting over my Creality Hi. The LED light I used, purchased from Lowe’s (link below), is a 12-inch plug-in light bar that delivers solid brightness (600 lumens). I chose PLA filament for its ease of printing, but you could print with PETG for added flexibility and higher heat resistance. Depending on the length of your PTFE and if the spool mount is on top, this could rub a bit when calibrating the printer on its highest Z axis. Just be aware when you calibrate and assist if needed.

Print Settings:
Creality Hi, 1h14m - (you might be able to reposition and run 2 up in your slicer, adding some time to the print)
Filament Weight: 38.21g
Filament Length: 12.81m
Infill: 45%, Rectilinear
Wall Loops: 2 (suggest more for strength at the cost of time)
No supports needed.
skirt loops to help with initial flow, with Brims for better adhesion and limiting possible warping since it's a bit larger.
Bed Temp 55C

Assembly:
Assembly is straightforward. Angle the support arms over the gantry and adjust positioning. Slide the light-bar into the receiving end of the support. This can be tight. You can also angle the slimmer part of the light bar and clip it into the support receiving end. It will click in by rotating. Since the gantry mounting area is a bit slimmer than the length of the light-bar, you will have to move them to adjust. For tidier cable management, you can zip-tie the cord to the support arm.

LED Light Bar:
Utilitech UnderCabinet 12-in Plug-in LED Under Cabinet Light Bar
https://www.lowes.com/pd/Utilitech-12-IN-Hi-Lo-Linkable-Light-Bar/5015018761

Creality Hi LED Supports

0.2mm layer, 2 walls, 45% infill

0.2mm layer, 2 walls, 15% infill