don't buy it, idk why they call it upgrade, it is more like downgrade, you will loose output, they are garbage if you ask me, i spend almost $100 on few of them, i considered them all crap, the only reason i still keep them, is that i spend $100 on them, let them sit in a box, they are only good if you don't care about brightness but runtime only,
now if you care about brightness, than you need fusion36leds drop in,(good flooder, not much throw, about $25, or tle300 great thrower, 3 modes, about $80, or sst 50 drop in sold on this board, 800lm (but not if you use alkaline cells) 3 modes, around $100.
or you could do conversion, there are literally dozens of conversion you can do, but they aren't drop ins, you need some skills to assemble those.