Pretty much as the title says, if you can decipher it.
Will a XP-L, run at 2.8A, on an aluminum non-DTP star live or die? Host is Convoy S2.
It’ll probably live.
It will get hotter though, compared to an XM-L(2) on a non DTP board (copper or aluminum doesn’t even matter that much).
Better order some DTP boards i.m.o.
It all depends. I find it rare, maybe the emitter had a lot of mileage?
In one of those hollow pill SK68 hosts, emitter 219B on DTP copper will go up above 100°C at 1.7A tail current with relative ease.
In a decent SK98, XM-L2 on non-DTP aluminium could stay at ≈90° on ≈2A tail current.
So, everything matters. 
Cheers ^:)
Much depends on the board design, thickness of the conductor and thermal pad
But the most important is how thick the indulation layer is, there are boards with very thin and some with really thick