Ok, so ive been doing a little research inspired by my obtaining that much needed step down converter for the wacoms backlight.

^ [ This is a very stable output ]

First of all, the output seems stable enough it could be used to directly drive the LEDs. its stepping down 24v to about 12v, touching it in places didnt seem to cause random jumps, which means left to itself it should be fine. Also it handled power just fine, didnt even need the heatsink (which came included).

This converter, an XL4015 cost about $2 and is apparently good up to 75W, or 50W without the heat sink.  Its common and generic so i wont post any links, since theyll likely soon expire, but make sure when getting a converter that its specifically either for stepping up, or stepping down, because while either may work for the other function, its usually incredibly unstable doing so, or inefficient, and for a backlight you need a stable output, or else you might get headaches or nausia, plus its just annoying.

The current backlight kit i have in the monitor seems to use LEDs which could probably handle a much higher current, but the driver, which uses a poorly made stepdown converter, does not allow manual tuning, it outputs a fixed current.

When i tested it, it seemed to handle its default output fine without any active cooling, but now its in there with a heatsink (the monitor backplate) so it should be safe to step it up a little.

The only drawback of running the LEDs off power directly (as in not with a purpose built LED driver) is that a separate controller will be required to actually change the backlight intensity via the monitor settings, but my prediction is that increasing the voltage (and overall power), will only allow me to marginally increase the brightness, probably not enough to ever merit dimming it further, before the efficiency begins to seriously drop, as it does when overpowering LEDs, however, as ive found with some 30w and 50W leds bought off aliexpress, the power output can double with the addition of only 2 volts, and so, if the backlight is being seriously underpowered, i should see a substantial boost in the brightness without any significant heating, for which some would be acceptable, as opposed to now, which is always stone cold even without the fan or A/C on.

Another reason why i have decided to try overpowering the LEDs, is because one of my new 12v 20W floodlights seems to have SMD leds of the same size which can run comfortably at a much higher temperature than the backlight strip did with zero cooling whatsoever.

So, to summarize, the LED kit driver is most likely an unneccesary bottleneck, and while i can get more power to the LEDs by using a 24v step down converter, best case its going to be only just enough for the monitor to be comfortably bright, but not so bright to ever merit needing the ability to dim the screen, so, the fact the monitor will no longer have firmware backlight control wont matter, which mine doesnt really have right now anyway.
My justification for taking this likely small risk is that recent experience has shown me that these LEDs are often used in products assembled and/or sold by people who know very little about them and so have them set to be considerably underpowered to play it safe.
In a smaller monitor without any cooling whatsoever, this probably wouldnt work, but, the 24HD itself is a giant heatsink so, if you used thermal grease on the LED strip you might even be able to power them into the red, of course, neither I nor the seller has any clue on what the real “specs” of the LEDs in the strip even are, so it makes sense that they are underpowered. Also underpowering all drivers safeguards the kit as a whole from defective LEDs, for which there are likely many of, at low power the LEDs display inconsistent brightness.

Worst case for me i drive the LEDs into an early grave, since i have a pretty good idea on how to tell the best output without making it an actual fire risk. If you took the LEDs out of the monitor though this would be an incredibly simple process, just turn it up until it gets too hot, but im not interested in going to that length since im already pretty content with its current performance, not happy, but not unhappy either.

If i do find a sweet spot i will probably give modifying the driver a shot, since it does have short/burn out protection after all, and it will run better when its input is only a few volts above its output.

Also, if by some miracle it does wont up so bright i might one day feel the need to adjust it, the video picture “brightness” setting, is always adjustable through the system monitor settings, and will be good enough short of conserving a tiny amount of power.

Lastly, i recommend everyone doing an LED backlight replacement get one of these stepdown converters, because they are otherwise perfect for the job of providing around 12v for the LED driver from the monitors 24v, and in retrospect using the 12v fan power rail for the backlight is kinda dodgy.
If you intend to run the LEDs off the 24v directly without using a driver and dont care about being able to adjust brightness, i recommend getting two 10W constant current LED drivers, one for each strip, and turn it up as high as each strip will allow, they are super cheap and essentially a slightly better step down converter albeit specifically for LEDs, plus they are optimized to work in a much more narrow voltage output range so you dont have to worry about heat. Constant current LED drivers make sure they output a specific current and the minimum voltage to acheive that current, with LEDs its generally best to run them at a fixed current instead of fixed voltage, since current draw may change as they heat up and so on. plus i would imagine its a simpler system too.