I used my 4Sevens Quark 123 on moonlight mode when I got home late last night, as it throws out enough light so see what I'm doing but doesn't wake the missus when I'm 'later than expected' ;)
Similarly to this thread:
http://www.candlepowerforums.com/vb/showthread.php?305840-Can-I-put-XM-L-emitter-into-a-Quark-123*2-Tactical
I have just bought the 4Sevens Quark "X" AA2 with the Cree XM-L emitter. Would I be able to use this head on my Quark 123?