Pardon my piping up master Padawan Warrior, I got nothing but respect. I been recently driver and HLG QB648 shopping, I think I have some insight, although I ultimately did not purchase a HLG 200 package. (I still really want one though…. But I really next want a QB288 v2 blue spec kit… please Santa come in February, maybe, please baby ganja Jesus).
The Diablo 200 comes w/ a Meanwell XLG-200-H-A, I believe. This model, the “A”, is dimmable via a built-in potentiometer in the back of the driver’s case.
Now, as the package is sold and assembled (per instructions or to be “under warranty”), the driver is mounted on top of this heat sink, with the ass-end not very ergonomically accessible.
Im assuming HLG says dimming is optional over “disassembly required” or etc.
Peace, may the force be with you