Based on the SuperSlim - LED Bar by jlauer

I used the profile to create end caps and mid supports that are secured by M3x8 bolts and T-nuts.

You'll need 2x endcaps and 1-2x mid supports per LED bar

From the original:

Here's a link for the LED light bar on Aliexpress. There are several vendors, so just search 300x6mm LED. Get the Warm White color temperature. Too stark of a bright white is harsh to look at.

300x6mm LED Lights (Pack of 10. About $1.70 each.)
https://www.aliexpress.com/item/32786326547.html

Wiring / Soldering

The light bars are 12V, so to plug them directly into your control board's 24V output, like HE2 (heater 2), so you can control the light from Klipper, you need to wire up 2 of the lights in serial to get 24V. Then wire up the other 2 in serial for another 24V. Then connect those together in parallel to drive off of one heater output. 

1. So connect the + out of HE2 to the + on your first LED bar (LED1).
2. Then connect the - from LED1 to the + on the your 2nd LED bar (LED2).
3. Then connect the - on LED2 to the - on HE2.
4. Go ahead and test out LED1 and LED2 by turning on HE2 using the settings in the section below.
5. Once you're happy, go ahead and finish connecting the last 2 LED bars the same way you did this set of LED bars in step 1 thru 3.