After doing some more reading about the hiccup aspect of the xlg models it could be an over current issue as well.
Had to do some research reading to get more familiar with them and their features as I've never played with one.
The xlg 240 according to its data sheet has it listed up to 110% over current limits and then it shuts down.
View attachment 10027
It'll do it for undercurrent readings as well. Lol.
So I see two other possible options of cause to what you're experiencing.
-1- The internal pot screw is slightly over rated and allows the driver to be set at higher than 110%.
Test and see what the output really is and you'll see what it's doing.
-2- As leds heat up, especially at high power, they can creep up in their current draw. Possibly above what the driver wants to give.
Hence causing these smart drivers, lol, possibly to shut down.
Do you have a good multimeter to check things with and see what it's all reading at?
Even a kill a watt would tell you what the wall draw is vs what the spec sheet says it's limits are. Not exactly an exact method, but use what you got if that's all you got. Lol
Or have you tried just swapping the two drivers with each other (if you have that option) and see if it still occurs and on which one.
That would at least let you know if it's the leds or the driver that's specifically causing it to happen.
From reading more into it, if your looking to completely eliminate that hiccup aspect then yes go for a driver that does not use that method of protection at all.
View attachment 10028
The HLG ones if overloaded go into CCL mode automatically and just push their set limited max power.
I've used all HLG drivers in everything I've built, have always had 0 issues with them.
May cost a bit more, but really bad ass bang for your buck. 7 yr warranty as well.
Anyways it's all Jmho. ???